690417971 has 2 divisors, whose sum is σ = 690417972. Its totient is φ = 690417970.

The previous prime is 690417899. The next prime is 690417977. The reversal of 690417971 is 179714096.

690417971 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 690417971 - 2¹⁸ = 690155827 is a prime.

It is not a weakly prime, because it can be changed into another prime (690417977) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345208985 + 345208986.

It is an arithmetic number, because the mean of its divisors is an integer number (345208986).

Almost surely, 2^690417971 is an apocalyptic number.

690417971 is a deficient number, since it is larger than the sum of its proper divisors (1).

690417971 is an equidigital number, since it uses as much as digits as its factorization.

690417971 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 95256, while the sum is 44.

The square root of 690417971 is about 26275.8058106693. The cubic root of 690417971 is about 883.8339825107.

The spelling of 690417971 in words is "six hundred ninety million, four hundred seventeen thousand, nine hundred seventy-one".