1679913765 has 12 divisors (see below), whose sum is σ = 2911850604. Its totient is φ = 895953984.

The previous prime is 1679913737. The next prime is 1679913773. The reversal of 1679913765 is 5673199761.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 569824641 + 1110089124 = 23871^2 + 33318^2 .

It is not a de Polignac number, because 1679913765 - 2⁸ = 1679913509 is a prime.

It is a super-2 number, since 2×1679913765² = 5644220515672950450, which contains 22 as substring.

It is a congruent number.

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 11 ways as a sum of consecutive naturals, for example, 18665664 + ... + 18665753.

It is an arithmetic number, because the mean of its divisors is an integer number (242654217).

Almost surely, 2^1679913765 is an apocalyptic number.

1679913765 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1679913765 is a deficient number, since it is larger than the sum of its proper divisors (1231936839).

1679913765 is a wasteful number, since it uses less digits than its factorization.

1679913765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37331428 (or 37331425 counting only the distinct ones).

The product of its digits is 2143260, while the sum is 54.

The square root of 1679913765 is about 40986.7510910538. The cubic root of 1679913765 is about 1188.7640499621.

The spelling of 1679913765 in words is "one billion, six hundred seventy-nine million, nine hundred thirteen thousand, seven hundred sixty-five".