122570639 has 2 divisors, whose sum is σ = 122570640. Its totient is φ = 122570638.

The previous prime is 122570593. The next prime is 122570641. The reversal of 122570639 is 936075221.

It is a strong prime.

It is an emirp because it is prime and its reverse (936075221) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-122570639 is a prime.

It is a Sophie Germain prime.

Together with 122570641, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 122570599 and 122570608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (122570699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 61285319 + 61285320.

It is an arithmetic number, because the mean of its divisors is an integer number (61285320).

Almost surely, 2^122570639 is an apocalyptic number.

122570639 is a deficient number, since it is larger than the sum of its proper divisors (1).

122570639 is an equidigital number, since it uses as much as digits as its factorization.

122570639 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 122570639 is about 11071.1624954203. The cubic root of 122570639 is about 496.7396382931.

The spelling of 122570639 in words is "one hundred twenty-two million, five hundred seventy thousand, six hundred thirty-nine".