70624091 has 4 divisors (see below), whose sum is σ = 70788384. Its totient is φ = 70459800.

The previous prime is 70624087. The next prime is 70624109. The reversal of 70624091 is 19042607.

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 70624091 - 2² = 70624087 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70624061) 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, 81500 + ... + 82361.

It is an arithmetic number, because the mean of its divisors is an integer number (17697096).

Almost surely, 2^70624091 is an apocalyptic number.

70624091 is a deficient number, since it is larger than the sum of its proper divisors (164293).

70624091 is a wasteful number, since it uses less digits than its factorization.

70624091 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 164292.

The product of its (nonzero) digits is 3024, while the sum is 29.

The square root of 70624091 is about 8403.8140745735. The cubic root of 70624091 is about 413.3496970773.

Adding to 70624091 its reverse (19042607), we get a palindrome (89666698).

The spelling of 70624091 in words is "seventy million, six hundred twenty-four thousand, ninety-one".