1690906097 has 2 divisors, whose sum is σ = 1690906098. Its totient is φ = 1690906096.

The previous prime is 1690906069. The next prime is 1690906177. The reversal of 1690906097 is 7906090961.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1470799201 + 220106896 = 38351^2 + 14836^2 .

It is a cyclic number.

It is not a de Polignac number, because 1690906097 - 2⁶ = 1690906033 is a prime.

It is not a weakly prime, because it can be changed into another prime (1690902097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845453048 + 845453049.

It is an arithmetic number, because the mean of its divisors is an integer number (845453049).

Almost surely, 2^1690906097 is an apocalyptic number.

It is an amenable number.

1690906097 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690906097 is an equidigital number, since it uses as much as digits as its factorization.

1690906097 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 183708, while the sum is 47.

The square root of 1690906097 is about 41120.6286065765. The cubic root of 1690906097 is about 1191.3512642741.

The spelling of 1690906097 in words is "one billion, six hundred ninety million, nine hundred six thousand, ninety-seven".