690718801 has 2 divisors, whose sum is σ = 690718802. Its totient is φ = 690718800.

The previous prime is 690718771. The next prime is 690718807. The reversal of 690718801 is 108817096.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 596531776 + 94187025 = 24424^2 + 9705^2 .

It is a cyclic number.

It is not a de Polignac number, because 690718801 - 2⁷ = 690718673 is a prime.

It is not a weakly prime, because it can be changed into another prime (690718807) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345359400 + 345359401.

It is an arithmetic number, because the mean of its divisors is an integer number (345359401).

Almost surely, 2^690718801 is an apocalyptic number.

It is an amenable number.

690718801 is a deficient number, since it is larger than the sum of its proper divisors (1).

690718801 is an equidigital number, since it uses as much as digits as its factorization.

690718801 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 40.

The square root of 690718801 is about 26281.5296548736. The cubic root of 690718801 is about 883.9623323801.

The spelling of 690718801 in words is "six hundred ninety million, seven hundred eighteen thousand, eight hundred one".