981996765 has 32 divisors (see below), whose sum is σ = 1624276992. Its totient is φ = 506088000.

The previous prime is 981996749. The next prime is 981996787. The reversal of 981996765 is 567699189.

It is not a de Polignac number, because 981996765 - 2⁴ = 981996749 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 981996699 and 981996708.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 459750 + ... + 461880.

It is an arithmetic number, because the mean of its divisors is an integer number (50758656).

Almost surely, 2^981996765 is an apocalyptic number.

It is an amenable number.

981996765 is a deficient number, since it is larger than the sum of its proper divisors (642280227).

981996765 is a wasteful number, since it uses less digits than its factorization.

981996765 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3161.

The product of its digits is 7348320, while the sum is 60.

The square root of 981996765 is about 31336.8276154431. The cubic root of 981996765 is about 993.9625441504.

The spelling of 981996765 in words is "nine hundred eighty-one million, nine hundred ninety-six thousand, seven hundred sixty-five".