629436631 has 4 divisors (see below), whose sum is σ = 629730064. Its totient is φ = 629143200.

The previous prime is 629436583. The next prime is 629436671. The reversal of 629436631 is 136634926.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 136634926 = 2 ⋅68317463.

It is a cyclic number.

It is not a de Polignac number, because 629436631 - 2¹⁹ = 628912343 is a prime.

It is a super-2 number, since 2×629436631² = 792380944889260322, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (629436671) 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, 143475 + ... + 147796.

It is an arithmetic number, because the mean of its divisors is an integer number (157432516).

Almost surely, 2^629436631 is an apocalyptic number.

629436631 is a deficient number, since it is larger than the sum of its proper divisors (293433).

629436631 is a wasteful number, since it uses less digits than its factorization.

629436631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 293432.

The product of its digits is 139968, while the sum is 40.

The square root of 629436631 is about 25088.5757068830. The cubic root of 629436631 is about 857.0062803991.

The spelling of 629436631 in words is "six hundred twenty-nine million, four hundred thirty-six thousand, six hundred thirty-one".