70609657 has 2 divisors, whose sum is σ = 70609658. Its totient is φ = 70609656.

The previous prime is 70609639. The next prime is 70609691. The reversal of 70609657 is 75690607.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59660176 + 10949481 = 7724^2 + 3309^2 .

It is an emirp because it is prime and its reverse (75690607) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70609657 - 2¹¹ = 70607609 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (70600657) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35304828 + 35304829.

It is an arithmetic number, because the mean of its divisors is an integer number (35304829).

Almost surely, 2^70609657 is an apocalyptic number.

It is an amenable number.

70609657 is a deficient number, since it is larger than the sum of its proper divisors (1).

70609657 is an equidigital number, since it uses as much as digits as its factorization.

70609657 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 79380, while the sum is 40.

The square root of 70609657 is about 8402.9552539568. The cubic root of 70609657 is about 413.3215353177.

The spelling of 70609657 in words is "seventy million, six hundred nine thousand, six hundred fifty-seven".