631436005 has 4 divisors (see below), whose sum is σ = 757723212. Its totient is φ = 505148800.

The previous prime is 631435991. The next prime is 631436027. The reversal of 631436005 is 500634136.

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 93103201 + 538332804 = 9649^2 + 23202^2 .

It is not a de Polignac number, because 631436005 - 2¹⁵ = 631403237 is a prime.

It is a super-2 number, since 2×631436005² = 797422856820720050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 63143596 + ... + 63143605.

It is an arithmetic number, because the mean of its divisors is an integer number (189430803).

Almost surely, 2^631436005 is an apocalyptic number.

It is an amenable number.

631436005 is a deficient number, since it is larger than the sum of its proper divisors (126287207).

631436005 is a wasteful number, since it uses less digits than its factorization.

631436005 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 126287206.

The product of its (nonzero) digits is 6480, while the sum is 28.

The square root of 631436005 is about 25128.3904180113. The cubic root of 631436005 is about 857.9127338467.

The spelling of 631436005 in words is "six hundred thirty-one million, four hundred thirty-six thousand, five".