111969457 has 2 divisors, whose sum is σ = 111969458. Its totient is φ = 111969456.

The previous prime is 111969449. The next prime is 111969467. The reversal of 111969457 is 754969111.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 99181681 + 12787776 = 9959^2 + 3576^2 .

It is a cyclic number.

It is not a de Polignac number, because 111969457 - 2³ = 111969449 is a prime.

It is not a weakly prime, because it can be changed into another prime (111969467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55984728 + 55984729.

It is an arithmetic number, because the mean of its divisors is an integer number (55984729).

Almost surely, 2^111969457 is an apocalyptic number.

It is an amenable number.

111969457 is a deficient number, since it is larger than the sum of its proper divisors (1).

111969457 is an equidigital number, since it uses as much as digits as its factorization.

111969457 is an evil number, because the sum of its binary digits is even.

The product of its digits is 68040, while the sum is 43.

The square root of 111969457 is about 10581.5621247527. The cubic root of 111969457 is about 481.9846316042.

The spelling of 111969457 in words is "one hundred eleven million, nine hundred sixty-nine thousand, four hundred fifty-seven".