1690986965 has 8 divisors (see below), whose sum is σ = 2056981848. Its totient is φ = 1334257920.

The previous prime is 1690986959. The next prime is 1690986967. The reversal of 1690986965 is 5696890961.

It can be written as a sum of positive squares in 4 ways, for example, as 14002564 + 1676984401 = 3742^2 + 40951^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1690986965 - 2²⁰ = 1689938389 is a prime.

It is a super-2 number, since 2×1690986965² = 5718873831599822450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1690986967) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2316056 + ... + 2316785.

It is an arithmetic number, because the mean of its divisors is an integer number (257122731).

Almost surely, 2^1690986965 is an apocalyptic number.

It is an amenable number.

1690986965 is a deficient number, since it is larger than the sum of its proper divisors (365994883).

1690986965 is an equidigital number, since it uses as much as digits as its factorization.

1690986965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4632919.

The product of its (nonzero) digits is 6298560, while the sum is 59.

The square root of 1690986965 is about 41121.6118969089. The cubic root of 1690986965 is about 1191.3702561938.

The spelling of 1690986965 in words is "one billion, six hundred ninety million, nine hundred eighty-six thousand, nine hundred sixty-five".