1690890187 has 16 divisors (see below), whose sum is σ = 1991448000. Its totient is φ = 1434955200.

The previous prime is 1690890181. The next prime is 1690890209. The reversal of 1690890187 is 7810980961.

It is not a de Polignac number, because 1690890187 - 2⁷ = 1690890059 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (49).

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 1690890187.

It is not an unprimeable number, because it can be changed into a prime (1690890181) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10239 + ... + 59047.

It is an arithmetic number, because the mean of its divisors is an integer number (124465500).

Almost surely, 2^1690890187 is an apocalyptic number.

1690890187 is a deficient number, since it is larger than the sum of its proper divisors (300557813).

1690890187 is an equidigital number, since it uses as much as digits as its factorization.

1690890187 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 48931 (or 48917 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 49.

The square root of 1690890187 is about 41120.4351509076. The cubic root of 1690890187 is about 1191.3475277256.

The spelling of 1690890187 in words is "one billion, six hundred ninety million, eight hundred ninety thousand, one hundred eighty-seven".