70102991 has 8 divisors (see below), whose sum is σ = 81822720. Its totient is φ = 58809528.

The previous prime is 70102961. The next prime is 70102993. The reversal of 70102991 is 19920107.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 70102991 - 2⁶ = 70102927 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70102993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 106211 + ... + 106868.

It is an arithmetic number, because the mean of its divisors is an integer number (10227840).

Almost surely, 2^70102991 is an apocalyptic number.

70102991 is a deficient number, since it is larger than the sum of its proper divisors (11719729).

70102991 is a wasteful number, since it uses less digits than its factorization.

70102991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213133.

The product of its (nonzero) digits is 1134, while the sum is 29.

The square root of 70102991 is about 8372.7528925677. The cubic root of 70102991 is about 412.3305525034.

It can be divided in two parts, 7010 and 2991, that added together give a palindrome (10001).

The spelling of 70102991 in words is "seventy million, one hundred two thousand, nine hundred ninety-one".