631789429 has 4 divisors (see below), whose sum is σ = 632033100. Its totient is φ = 631545760.

The previous prime is 631789409. The next prime is 631789439. The reversal of 631789429 is 924987136.

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

It can be written as a sum of positive squares in 2 ways, for example, as 219780625 + 412008804 = 14825^2 + 20298^2 .

It is a cyclic number.

It is not a de Polignac number, because 631789429 - 2⁹ = 631788917 is a prime.

It is a super-2 number, since 2×631789429² = 798315765192292082, 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 (631789409) 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, 117904 + ... + 123145.

It is an arithmetic number, because the mean of its divisors is an integer number (158008275).

Almost surely, 2^631789429 is an apocalyptic number.

It is an amenable number.

631789429 is a deficient number, since it is larger than the sum of its proper divisors (243671).

631789429 is a wasteful number, since it uses less digits than its factorization.

631789429 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243670.

The product of its digits is 653184, while the sum is 49.

The square root of 631789429 is about 25135.4217987286. The cubic root of 631789429 is about 858.0727661094.

The spelling of 631789429 in words is "six hundred thirty-one million, seven hundred eighty-nine thousand, four hundred twenty-nine".