111881629 has 2 divisors, whose sum is σ = 111881630. Its totient is φ = 111881628.

The previous prime is 111881611. The next prime is 111881659. The reversal of 111881629 is 926188111.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 108264025 + 3617604 = 10405^2 + 1902^2 .

It is a cyclic number.

It is not a de Polignac number, because 111881629 - 2¹⁷ = 111750557 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (111881659) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 55940814 + 55940815.

It is an arithmetic number, because the mean of its divisors is an integer number (55940815).

Almost surely, 2^111881629 is an apocalyptic number.

It is an amenable number.

111881629 is a deficient number, since it is larger than the sum of its proper divisors (1).

111881629 is an equidigital number, since it uses as much as digits as its factorization.

111881629 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 37.

The square root of 111881629 is about 10577.4112617407. The cubic root of 111881629 is about 481.8585769330.

The spelling of 111881629 in words is "one hundred eleven million, eight hundred eighty-one thousand, six hundred twenty-nine".