111890437 has 2 divisors, whose sum is σ = 111890438. Its totient is φ = 111890436.

The previous prime is 111890431. The next prime is 111890461. The reversal of 111890437 is 734098111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 87030241 + 24860196 = 9329^2 + 4986^2 .

It is an emirp because it is prime and its reverse (734098111) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 111890437 - 2⁷ = 111890309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111890431) 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 as a sum of consecutive naturals, namely, 55945218 + 55945219.

It is an arithmetic number, because the mean of its divisors is an integer number (55945219).

Almost surely, 2^111890437 is an apocalyptic number.

It is an amenable number.

111890437 is a deficient number, since it is larger than the sum of its proper divisors (1).

111890437 is an equidigital number, since it uses as much as digits as its factorization.

111890437 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6048, while the sum is 34.

The square root of 111890437 is about 10577.8276125110. The cubic root of 111890437 is about 481.8712215438.

The spelling of 111890437 in words is "one hundred eleven million, eight hundred ninety thousand, four hundred thirty-seven".