117561739 has 2 divisors, whose sum is σ = 117561740. Its totient is φ = 117561738.

The previous prime is 117561713. The next prime is 117561779. The reversal of 117561739 is 937165711.

It is an a-pointer prime, because the next prime (117561779) can be obtained adding 117561739 to its sum of digits (40).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 117561739 - 2⁷ = 117561611 is a prime.

It is not a weakly prime, because it can be changed into another prime (117561709) 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, 58780869 + 58780870.

It is an arithmetic number, because the mean of its divisors is an integer number (58780870).

Almost surely, 2^117561739 is an apocalyptic number.

117561739 is a deficient number, since it is larger than the sum of its proper divisors (1).

117561739 is an equidigital number, since it uses as much as digits as its factorization.

117561739 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 39690, while the sum is 40.

The square root of 117561739 is about 10842.5891280635. The cubic root of 117561739 is about 489.8788246801.

The spelling of 117561739 in words is "one hundred seventeen million, five hundred sixty-one thousand, seven hundred thirty-nine".