1690253297 has 2 divisors, whose sum is σ = 1690253298. Its totient is φ = 1690253296.

The previous prime is 1690253231. The next prime is 1690253311. The reversal of 1690253297 is 7923520961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1290893041 + 399360256 = 35929^2 + 19984^2 .

It is a cyclic number.

It is not a de Polignac number, because 1690253297 - 2⁸ = 1690253041 is a prime.

It is not a weakly prime, because it can be changed into another prime (1690253597) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845126648 + 845126649.

It is an arithmetic number, because the mean of its divisors is an integer number (845126649).

Almost surely, 2^1690253297 is an apocalyptic number.

It is an amenable number.

1690253297 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690253297 is an equidigital number, since it uses as much as digits as its factorization.

1690253297 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 204120, while the sum is 44.

The square root of 1690253297 is about 41112.6902184715. The cubic root of 1690253297 is about 1191.1979314523.

The spelling of 1690253297 in words is "one billion, six hundred ninety million, two hundred fifty-three thousand, two hundred ninety-seven".