70640933 has 16 divisors (see below), whose sum is σ = 82342656. Its totient is φ = 59888640.

The previous prime is 70640893. The next prime is 70640957. The reversal of 70640933 is 33904607.

It is a cyclic number.

It is not a de Polignac number, because 70640933 - 2¹⁴ = 70624549 is a prime.

It is a super-2 number, since 2×70640933² = 9980282830220978, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 70640933.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70640963) 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 15 ways as a sum of consecutive naturals, for example, 19460 + ... + 22802.

It is an arithmetic number, because the mean of its divisors is an integer number (5146416).

Almost surely, 2^70640933 is an apocalyptic number.

It is an amenable number.

70640933 is a deficient number, since it is larger than the sum of its proper divisors (11701723).

70640933 is a wasteful number, since it uses less digits than its factorization.

70640933 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3484.

The product of its (nonzero) digits is 13608, while the sum is 32.

The square root of 70640933 is about 8404.8160598552. The cubic root of 70640933 is about 413.3825521658.

The spelling of 70640933 in words is "seventy million, six hundred forty thousand, nine hundred thirty-three".