70649331 has 32 divisors (see below), whose sum is σ = 102643200. Its totient is φ = 43061760.

The previous prime is 70649321. The next prime is 70649333. The reversal of 70649331 is 13394607.

It is not a de Polignac number, because 70649331 - 2⁹ = 70648819 is a prime.

It is a super-2 number, since 2×70649331² = 9982655941495122, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 70649292 and 70649301.

It is not an unprimeable number, because it can be changed into a prime (70649333) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 394600 + ... + 394778.

It is an arithmetic number, because the mean of its divisors is an integer number (3207600).

Almost surely, 2^70649331 is an apocalyptic number.

70649331 is a gapful number since it is divisible by the number (71) formed by its first and last digit.

70649331 is a deficient number, since it is larger than the sum of its proper divisors (31993869).

70649331 is a wasteful number, since it uses less digits than its factorization.

70649331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 379.

The product of its (nonzero) digits is 13608, while the sum is 33.

The square root of 70649331 is about 8405.3156395224. The cubic root of 70649331 is about 413.3989328909.

The spelling of 70649331 in words is "seventy million, six hundred forty-nine thousand, three hundred thirty-one".