111390457 has 2 divisors, whose sum is σ = 111390458. Its totient is φ = 111390456.

The previous prime is 111390439. The next prime is 111390469. The reversal of 111390457 is 754093111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 111007296 + 383161 = 10536^2 + 619^2 .

It is a cyclic number.

It is not a de Polignac number, because 111390457 - 2²³ = 103001849 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (111390157) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55695228 + 55695229.

It is an arithmetic number, because the mean of its divisors is an integer number (55695229).

Almost surely, 2^111390457 is an apocalyptic number.

It is an amenable number.

111390457 is a deficient number, since it is larger than the sum of its proper divisors (1).

111390457 is an equidigital number, since it uses as much as digits as its factorization.

111390457 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3780, while the sum is 31.

The square root of 111390457 is about 10554.1677549677. The cubic root of 111390457 is about 481.1524060941.

The spelling of 111390457 in words is "one hundred eleven million, three hundred ninety thousand, four hundred fifty-seven".