70813189 has 2 divisors, whose sum is σ = 70813190. Its totient is φ = 70813188.

The previous prime is 70813187. The next prime is 70813213. The reversal of 70813189 is 98131807.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69472225 + 1340964 = 8335^2 + 1158^2 .

It is a cyclic number.

It is not a de Polignac number, because 70813189 - 2¹ = 70813187 is a prime.

Together with 70813187, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70813187) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35406594 + 35406595.

It is an arithmetic number, because the mean of its divisors is an integer number (35406595).

Almost surely, 2^70813189 is an apocalyptic number.

It is an amenable number.

70813189 is a deficient number, since it is larger than the sum of its proper divisors (1).

70813189 is an equidigital number, since it uses as much as digits as its factorization.

70813189 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 12096, while the sum is 37.

The square root of 70813189 is about 8415.0572784741. The cubic root of 70813189 is about 413.7182868024.

The spelling of 70813189 in words is "seventy million, eight hundred thirteen thousand, one hundred eighty-nine".