70637131 has 4 divisors (see below), whose sum is σ = 70699032. Its totient is φ = 70575232.

The previous prime is 70637093. The next prime is 70637153. The reversal of 70637131 is 13173607.

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

It is a cyclic number.

It is not a de Polignac number, because 70637131 - 2⁹ = 70636619 is a prime.

It is a super-2 number, since 2×70637131² = 9979208551822322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70637131.

It is not an unprimeable number, because it can be changed into a prime (70634131) 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, 29206 + ... + 31531.

It is an arithmetic number, because the mean of its divisors is an integer number (17674758).

Almost surely, 2^70637131 is an apocalyptic number.

70637131 is a deficient number, since it is larger than the sum of its proper divisors (61901).

70637131 is a wasteful number, since it uses less digits than its factorization.

70637131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61900.

The product of its (nonzero) digits is 2646, while the sum is 28.

The square root of 70637131 is about 8404.5898769660. The cubic root of 70637131 is about 413.3751357450.

The spelling of 70637131 in words is "seventy million, six hundred thirty-seven thousand, one hundred thirty-one".