690519971 has 2 divisors, whose sum is σ = 690519972. Its totient is φ = 690519970.

The previous prime is 690519941. The next prime is 690519989. The reversal of 690519971 is 179915096.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 690519971 - 2¹⁴ = 690503587 is a prime.

It is not a weakly prime, because it can be changed into another prime (690519901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 345259985 + 345259986.

It is an arithmetic number, because the mean of its divisors is an integer number (345259986).

Almost surely, 2^690519971 is an apocalyptic number.

690519971 is a deficient number, since it is larger than the sum of its proper divisors (1).

690519971 is an equidigital number, since it uses as much as digits as its factorization.

690519971 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 153090, while the sum is 47.

The square root of 690519971 is about 26277.7466880248. The cubic root of 690519971 is about 883.8775052418.

The spelling of 690519971 in words is "six hundred ninety million, five hundred nineteen thousand, nine hundred seventy-one".