698762089 has 2 divisors, whose sum is σ = 698762090. Its totient is φ = 698762088.

The previous prime is 698762081. The next prime is 698762093. The reversal of 698762089 is 980267896.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 669515625 + 29246464 = 25875^2 + 5408^2 .

It is a cyclic number.

It is not a de Polignac number, because 698762089 - 2³ = 698762081 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (698762081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 349381044 + 349381045.

It is an arithmetic number, because the mean of its divisors is an integer number (349381045).

Almost surely, 2^698762089 is an apocalyptic number.

It is an amenable number.

698762089 is a deficient number, since it is larger than the sum of its proper divisors (1).

698762089 is an equidigital number, since it uses as much as digits as its factorization.

698762089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2612736, while the sum is 55.

The square root of 698762089 is about 26434.1084396656. The cubic root of 698762089 is about 887.3802899834.

The spelling of 698762089 in words is "six hundred ninety-eight million, seven hundred sixty-two thousand, eighty-nine".