1913901377 has 4 divisors (see below), whose sum is σ = 1922115780. Its totient is φ = 1905686976.

The previous prime is 1913901373. The next prime is 1913901389. The reversal of 1913901377 is 7731093191.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 802079041 + 1111822336 = 28321^2 + 33344^2 .

It is a cyclic number.

It is not a de Polignac number, because 1913901377 - 2² = 1913901373 is a prime.

It is a super-2 number, since 2×1913901377² = 7326036961764992258, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1913901373) 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 3 ways as a sum of consecutive naturals, for example, 4106852 + ... + 4107317.

It is an arithmetic number, because the mean of its divisors is an integer number (480528945).

Almost surely, 2^1913901377 is an apocalyptic number.

It is an amenable number.

1913901377 is a deficient number, since it is larger than the sum of its proper divisors (8214403).

1913901377 is an equidigital number, since it uses as much as digits as its factorization.

1913901377 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8214402.

The product of its (nonzero) digits is 35721, while the sum is 41.

The square root of 1913901377 is about 43748.1585555324. The cubic root of 1913901377 is about 1241.5756455076.

The spelling of 1913901377 in words is "one billion, nine hundred thirteen million, nine hundred one thousand, three hundred seventy-seven".