70990513 has 8 divisors (see below), whose sum is σ = 77507136. Its totient is φ = 64484400.

The previous prime is 70990459. The next prime is 70990547. The reversal of 70990513 is 31509907.

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 70990513 - 2²¹ = 68893361 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70990573) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20068 + ... + 23338.

It is an arithmetic number, because the mean of its divisors is an integer number (9688392).

Almost surely, 2^70990513 is an apocalyptic number.

It is an amenable number.

70990513 is a deficient number, since it is larger than the sum of its proper divisors (6516623).

70990513 is a wasteful number, since it uses less digits than its factorization.

70990513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5255.

The product of its (nonzero) digits is 8505, while the sum is 34.

The square root of 70990513 is about 8425.5868044902. The cubic root of 70990513 is about 414.0633309574.

The spelling of 70990513 in words is "seventy million, nine hundred ninety thousand, five hundred thirteen".