629967381 has 16 divisors (see below), whose sum is σ = 861580800. Its totient is φ = 409273280.

The previous prime is 629967379. The next prime is 629967383. The reversal of 629967381 is 183769926.

It is an interprime number because it is at equal distance from previous prime (629967379) and next prime (629967383).

It is a cyclic number.

It is not a de Polignac number, because 629967381 - 2¹ = 629967379 is a prime.

It is a super-2 number, since 2×629967381² = 793717802247998322, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (629967383) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10396 + ... + 36986.

It is an arithmetic number, because the mean of its divisors is an integer number (53848800).

Almost surely, 2^629967381 is an apocalyptic number.

It is an amenable number.

629967381 is a deficient number, since it is larger than the sum of its proper divisors (231613419).

629967381 is a wasteful number, since it uses less digits than its factorization.

629967381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26796.

The product of its digits is 979776, while the sum is 51.

The square root of 629967381 is about 25099.1510015777. The cubic root of 629967381 is about 857.2470927244.

The spelling of 629967381 in words is "six hundred twenty-nine million, nine hundred sixty-seven thousand, three hundred eighty-one".