168920761 has 2 divisors, whose sum is σ = 168920762. Its totient is φ = 168920760.

The previous prime is 168920753. The next prime is 168920771. The reversal of 168920761 is 167029861.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 131331600 + 37589161 = 11460^2 + 6131^2 .

It is a cyclic number.

It is not a de Polignac number, because 168920761 - 2³ = 168920753 is a prime.

It is not a weakly prime, because it can be changed into another prime (168920771) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 84460380 + 84460381.

It is an arithmetic number, because the mean of its divisors is an integer number (84460381).

Almost surely, 2^168920761 is an apocalyptic number.

It is an amenable number.

168920761 is a deficient number, since it is larger than the sum of its proper divisors (1).

168920761 is an equidigital number, since it uses as much as digits as its factorization.

168920761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 36288, while the sum is 40.

The square root of 168920761 is about 12996.9519888318. The cubic root of 168920761 is about 552.7910586706.

The spelling of 168920761 in words is "one hundred sixty-eight million, nine hundred twenty thousand, seven hundred sixty-one".