70993291 has 6 divisors (see below), whose sum is σ = 74768460. Its totient is φ = 67222008.

The previous prime is 70993289. The next prime is 70993333. The reversal of 70993291 is 19239907.

It is not a de Polignac number, because 70993291 - 2¹ = 70993289 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70993201) 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 5 ways as a sum of consecutive naturals, for example, 35761 + ... + 37693.

It is an arithmetic number, because the mean of its divisors is an integer number (12461410).

Almost surely, 2^70993291 is an apocalyptic number.

70993291 is a deficient number, since it is larger than the sum of its proper divisors (3775169).

70993291 is an frugal number, since it uses more digits than its factorization.

70993291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3885 (or 1952 counting only the distinct ones).

The product of its (nonzero) digits is 30618, while the sum is 40.

The square root of 70993291 is about 8425.7516578641. The cubic root of 70993291 is about 414.0687319276.

The spelling of 70993291 in words is "seventy million, nine hundred ninety-three thousand, two hundred ninety-one".