629879091 has 4 divisors (see below), whose sum is σ = 839838792. Its totient is φ = 419919392.

The previous prime is 629879071. The next prime is 629879137. The reversal of 629879091 is 190978926.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 629879091 - 2⁶ = 629879027 is a prime.

It is not an unprimeable number, because it can be changed into a prime (629879021) 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, 104979846 + ... + 104979851.

It is an arithmetic number, because the mean of its divisors is an integer number (209959698).

Almost surely, 2^629879091 is an apocalyptic number.

629879091 is a deficient number, since it is larger than the sum of its proper divisors (209959701).

629879091 is a wasteful number, since it uses less digits than its factorization.

629879091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 209959700.

The product of its (nonzero) digits is 489888, while the sum is 51.

The square root of 629879091 is about 25097.3921155167. The cubic root of 629879091 is about 857.2070430942.

The spelling of 629879091 in words is "six hundred twenty-nine million, eight hundred seventy-nine thousand, ninety-one".