70620779 has 2 divisors, whose sum is σ = 70620780. Its totient is φ = 70620778.

The previous prime is 70620769. The next prime is 70620791. The reversal of 70620779 is 97702607.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 70620779 - 2²⁴ = 53843563 is a prime.

It is not a weakly prime, because it can be changed into another prime (70620769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35310389 + 35310390.

It is an arithmetic number, because the mean of its divisors is an integer number (35310390).

Almost surely, 2^70620779 is an apocalyptic number.

70620779 is a deficient number, since it is larger than the sum of its proper divisors (1).

70620779 is an equidigital number, since it uses as much as digits as its factorization.

70620779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 37044, while the sum is 38.

The square root of 70620779 is about 8403.6170188794. The cubic root of 70620779 is about 413.3432354692.

The spelling of 70620779 in words is "seventy million, six hundred twenty thousand, seven hundred seventy-nine".