629922987 has 20 divisors (see below), whose sum is σ = 945481416. Its totient is φ = 417947040.

The previous prime is 629922983. The next prime is 629922989. The reversal of 629922987 is 789229926.

It is a happy number.

629922987 is a `hidden beast` number, since 629 + 9 + 2 + 2 + 9 + 8 + 7 = 666.

It is not a de Polignac number, because 629922987 - 2² = 629922983 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (629922983) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 1338 + ... + 35519.

Almost surely, 2^629922987 is an apocalyptic number.

629922987 is a deficient number, since it is larger than the sum of its proper divisors (315558429).

629922987 is a wasteful number, since it uses less digits than its factorization.

629922987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37080 (or 37071 counting only the distinct ones).

The product of its digits is 1959552, while the sum is 54.

The square root of 629922987 is about 25098.2666134536. The cubic root of 629922987 is about 857.2269554270.

The spelling of 629922987 in words is "six hundred twenty-nine million, nine hundred twenty-two thousand, nine hundred eighty-seven".