70561213 has 2 divisors, whose sum is σ = 70561214. Its totient is φ = 70561212.

The previous prime is 70561199. The next prime is 70561219. The reversal of 70561213 is 31216507.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 59552089 + 11009124 = 7717^2 + 3318^2 .

It is a cyclic number.

It is not a de Polignac number, because 70561213 - 2⁵ = 70561181 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70561219) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35280606 + 35280607.

It is an arithmetic number, because the mean of its divisors is an integer number (35280607).

Almost surely, 2^70561213 is an apocalyptic number.

It is an amenable number.

70561213 is a deficient number, since it is larger than the sum of its proper divisors (1).

70561213 is an equidigital number, since it uses as much as digits as its factorization.

70561213 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 70561213 is about 8400.0722020706. The cubic root of 70561213 is about 413.2269895658.

The spelling of 70561213 in words is "seventy million, five hundred sixty-one thousand, two hundred thirteen".