107991929 has 4 divisors (see below), whose sum is σ = 108013476. Its totient is φ = 107970384.

The previous prime is 107991883. The next prime is 107991959. The reversal of 107991929 is 929199701.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8690704 + 99301225 = 2948^2 + 9965^2 .

It is a cyclic number.

It is not a de Polignac number, because 107991929 - 2¹² = 107987833 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (107991959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1127 + ... + 14739.

It is an arithmetic number, because the mean of its divisors is an integer number (27003369).

Almost surely, 2^107991929 is an apocalyptic number.

It is an amenable number.

107991929 is a deficient number, since it is larger than the sum of its proper divisors (21547).

107991929 is an equidigital number, since it uses as much as digits as its factorization.

107991929 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21546.

The product of its (nonzero) digits is 91854, while the sum is 47.

The square root of 107991929 is about 10391.9165219896. The cubic root of 107991929 is about 476.2084524117.

The spelling of 107991929 in words is "one hundred seven million, nine hundred ninety-one thousand, nine hundred twenty-nine".