1690608677 has 2 divisors, whose sum is σ = 1690608678. Its totient is φ = 1690608676.

The previous prime is 1690608641. The next prime is 1690608709. The reversal of 1690608677 is 7768060961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1660644001 + 29964676 = 40751^2 + 5474^2 .

It is a cyclic number.

It is not a de Polignac number, because 1690608677 - 2⁶ = 1690608613 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1690608617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 845304338 + 845304339.

It is an arithmetic number, because the mean of its divisors is an integer number (845304339).

Almost surely, 2^1690608677 is an apocalyptic number.

It is an amenable number.

1690608677 is a deficient number, since it is larger than the sum of its proper divisors (1).

1690608677 is an equidigital number, since it uses as much as digits as its factorization.

1690608677 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 762048, while the sum is 50.

The square root of 1690608677 is about 41117.0120144935. The cubic root of 1690608677 is about 1191.2814097209.

The spelling of 1690608677 in words is "one billion, six hundred ninety million, six hundred eight thousand, six hundred seventy-seven".