1913914081 has 4 divisors (see below), whose sum is σ = 1933645252. Its totient is φ = 1894182912.

The previous prime is 1913914069. The next prime is 1913914103. The reversal of 1913914081 is 1804193191.

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 1127616400 + 786297681 = 33580^2 + 28041^2 .

It is a cyclic number.

It is not a de Polignac number, because 1913914081 - 2²³ = 1905525473 is a prime.

It is a super-2 number, since 2×1913914081² = 7326134218900149122, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1913914081.

It is not an unprimeable number, because it can be changed into a prime (1913914031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9865440 + ... + 9865633.

It is an arithmetic number, because the mean of its divisors is an integer number (483411313).

Almost surely, 2^1913914081 is an apocalyptic number.

It is an amenable number.

1913914081 is a deficient number, since it is larger than the sum of its proper divisors (19731171).

1913914081 is an equidigital number, since it uses as much as digits as its factorization.

1913914081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19731170.

The product of its (nonzero) digits is 7776, while the sum is 37.

The square root of 1913914081 is about 43748.3037499741. The cubic root of 1913914081 is about 1241.5783925914.

The spelling of 1913914081 in words is "one billion, nine hundred thirteen million, nine hundred fourteen thousand, eighty-one".