111405649 has 2 divisors, whose sum is σ = 111405650. Its totient is φ = 111405648.

The previous prime is 111405611. The next prime is 111405653. The reversal of 111405649 is 946504111.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 82029249 + 29376400 = 9057^2 + 5420^2 .

It is a cyclic number.

It is not a de Polignac number, because 111405649 - 2⁹ = 111405137 is a prime.

It is a super-2 number, since 2×111405649² = 24822437258222402, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 111405649.

It is not a weakly prime, because it can be changed into another prime (111405659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55702824 + 55702825.

It is an arithmetic number, because the mean of its divisors is an integer number (55702825).

Almost surely, 2^111405649 is an apocalyptic number.

It is an amenable number.

111405649 is a deficient number, since it is larger than the sum of its proper divisors (1).

111405649 is an equidigital number, since it uses as much as digits as its factorization.

111405649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4320, while the sum is 31.

The square root of 111405649 is about 10554.8874461076. The cubic root of 111405649 is about 481.1742791081.

The spelling of 111405649 in words is "one hundred eleven million, four hundred five thousand, six hundred forty-nine".