1690669956 has 24 divisors (see below), whose sum is σ = 4080928320. Its totient is φ = 544123552.

The previous prime is 1690669943. The next prime is 1690669969. The reversal of 1690669956 is 6599660961.

It is an interprime number because it is at equal distance from previous prime (1690669943) and next prime (1690669969).

It is a junction number, because it is equal to n+sod(n) for n = 1690669896 and 1690669905.

It is an unprimeable number.

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 7 ways as a sum of consecutive naturals, for example, 2428776 + ... + 2429471.

It is an arithmetic number, because the mean of its divisors is an integer number (170038680).

Almost surely, 2^1690669956 is an apocalyptic number.

It is an amenable number.

1690669956 is an abundant number, since it is smaller than the sum of its proper divisors (2390258364).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1690669956 is a wasteful number, since it uses less digits than its factorization.

1690669956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4858283 (or 4858281 counting only the distinct ones).

The product of its (nonzero) digits is 4723920, while the sum is 57.

The square root of 1690669956 is about 41117.7571859166. The cubic root of 1690669956 is about 1191.2958028903.

The spelling of 1690669956 in words is "one billion, six hundred ninety million, six hundred sixty-nine thousand, nine hundred fifty-six".