629897731 has 8 divisors (see below), whose sum is σ = 655113920. Its totient is φ = 605112768.

The previous prime is 629897717. The next prime is 629897743. The reversal of 629897731 is 137798926.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 629897731 - 2⁵ = 629897699 is a prime.

It is a super-2 number, since 2×629897731² = 793542303037896722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (629897701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 104826 + ... + 110671.

It is an arithmetic number, because the mean of its divisors is an integer number (81889240).

Almost surely, 2^629897731 is an apocalyptic number.

629897731 is a deficient number, since it is larger than the sum of its proper divisors (25216189).

629897731 is a wasteful number, since it uses less digits than its factorization.

629897731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 215613.

The product of its digits is 1143072, while the sum is 52.

The square root of 629897731 is about 25097.7634660939. The cubic root of 629897731 is about 857.2154987814.

The spelling of 629897731 in words is "six hundred twenty-nine million, eight hundred ninety-seven thousand, seven hundred thirty-one".