70970621 has 4 divisors (see below), whose sum is σ = 72029952. Its totient is φ = 69911292.

The previous prime is 70970593. The next prime is 70970623. The reversal of 70970621 is 12607907.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70970621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70970623) 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 3 ways as a sum of consecutive naturals, for example, 529565 + ... + 529698.

It is an arithmetic number, because the mean of its divisors is an integer number (18007488).

Almost surely, 2^70970621 is an apocalyptic number.

It is an amenable number.

70970621 is a deficient number, since it is larger than the sum of its proper divisors (1059331).

70970621 is a wasteful number, since it uses less digits than its factorization.

70970621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1059330.

The product of its (nonzero) digits is 5292, while the sum is 32.

The square root of 70970621 is about 8424.4062698804. The cubic root of 70970621 is about 414.0246529385.

The spelling of 70970621 in words is "seventy million, nine hundred seventy thousand, six hundred twenty-one".