1913446931 has 18 divisors (see below), whose sum is σ = 2124277596. Its totient is φ = 1723538520.

The previous prime is 1913446921. The next prime is 1913446933. The reversal of 1913446931 is 1396443191.

It is a powerful number, because all its prime factors have an exponent greater than 1 and also an Achilles number because it is not a perfect power.

It is a de Polignac number, because none of the positive numbers 2^k-1913446931 is a prime.

It is a super-2 number, since 2×1913446931² = 7322558315506637522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1913446933) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 17554505 + ... + 17554613.

It is an arithmetic number, because the mean of its divisors is an integer number (118015422).

Almost surely, 2^1913446931 is an apocalyptic number.

1913446931 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

1913446931 is a deficient number, since it is larger than the sum of its proper divisors (210830665).

1913446931 is an frugal number, since it uses more digits than its factorization.

1913446931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 273 (or 120 counting only the distinct ones).

The product of its digits is 69984, while the sum is 41.

The square root of 1913446931 is about 43742.9643599974. The cubic root of 1913446931 is about 1241.4773691533.

It can be divided in two parts, 1913 and 446931, that added together give a palindrome (448844).

The spelling of 1913446931 in words is "one billion, nine hundred thirteen million, four hundred forty-six thousand, nine hundred thirty-one".