113557019 has 2 divisors, whose sum is σ = 113557020. Its totient is φ = 113557018.

The previous prime is 113556997. The next prime is 113557021. The reversal of 113557019 is 910755311.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-113557019 is a prime.

It is a super-2 number, since 2×113557019² = 25790393128332722, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 113557021, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (113557079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56778509 + 56778510.

It is an arithmetic number, because the mean of its divisors is an integer number (56778510).

Almost surely, 2^113557019 is an apocalyptic number.

113557019 is a deficient number, since it is larger than the sum of its proper divisors (1).

113557019 is an equidigital number, since it uses as much as digits as its factorization.

113557019 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4725, while the sum is 32.

The square root of 113557019 is about 10656.3135745904. The cubic root of 113557019 is about 484.2518937316.

The spelling of 113557019 in words is "one hundred thirteen million, five hundred fifty-seven thousand, nineteen".