68902049 has 2 divisors, whose sum is σ = 68902050. Its totient is φ = 68902048.

The previous prime is 68902033. The next prime is 68902073. The reversal of 68902049 is 94020986.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 64513024 + 4389025 = 8032^2 + 2095^2 .

It is a cyclic number.

It is not a de Polignac number, because 68902049 - 2⁴ = 68902033 is a prime.

It is a Sophie Germain prime.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (68902079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34451024 + 34451025.

It is an arithmetic number, because the mean of its divisors is an integer number (34451025).

Almost surely, 2^68902049 is an apocalyptic number.

It is an amenable number.

68902049 is a deficient number, since it is larger than the sum of its proper divisors (1).

68902049 is an equidigital number, since it uses as much as digits as its factorization.

68902049 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 68902049 is about 8300.7258116384. The cubic root of 68902049 is about 409.9624177330.

The spelling of 68902049 in words is "sixty-eight million, nine hundred two thousand, forty-nine".