117570721 has 2 divisors, whose sum is σ = 117570722. Its totient is φ = 117570720.

The previous prime is 117570709. The next prime is 117570773. The reversal of 117570721 is 127075711.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 90155025 + 27415696 = 9495^2 + 5236^2 .

It is a cyclic number.

It is not a de Polignac number, because 117570721 - 2¹⁷ = 117439649 is a prime.

It is not a weakly prime, because it can be changed into another prime (117570121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 58785360 + 58785361.

It is an arithmetic number, because the mean of its divisors is an integer number (58785361).

Almost surely, 2^117570721 is an apocalyptic number.

It is an amenable number.

117570721 is a deficient number, since it is larger than the sum of its proper divisors (1).

117570721 is an equidigital number, since it uses as much as digits as its factorization.

117570721 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3430, while the sum is 31.

The square root of 117570721 is about 10843.0033201139. The cubic root of 117570721 is about 489.8913003364.

The spelling of 117570721 in words is "one hundred seventeen million, five hundred seventy thousand, seven hundred twenty-one".