1690874257 has 16 divisors (see below), whose sum is σ = 1740150720. Its totient is φ = 1642540032.

The previous prime is 1690874249. The next prime is 1690874267. The reversal of 1690874257 is 7524780961.

It is a cyclic number.

It is not a de Polignac number, because 1690874257 - 2³ = 1690874249 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1690874257.

It is not an unprimeable number, because it can be changed into a prime (1690874267) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1303033 + ... + 1304329.

It is an arithmetic number, because the mean of its divisors is an integer number (108759420).

Almost surely, 2^1690874257 is an apocalyptic number.

It is an amenable number.

1690874257 is a deficient number, since it is larger than the sum of its proper divisors (49276463).

1690874257 is a wasteful number, since it uses less digits than its factorization.

1690874257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1632.

The product of its (nonzero) digits is 846720, while the sum is 49.

The square root of 1690874257 is about 41120.2414511394. The cubic root of 1690874257 is about 1191.3437864565.

The spelling of 1690874257 in words is "one billion, six hundred ninety million, eight hundred seventy-four thousand, two hundred fifty-seven".