873777981 has 32 divisors (see below), whose sum is σ = 1244056320. Its totient is φ = 544287744.

The previous prime is 873777929. The next prime is 873778039. The reversal of 873777981 is 189777378.

873777981 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 873777981 - 2¹⁷ = 873646909 is a prime.

It is a super-2 number, since 2×873777981² = 1526975920160872722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (873777911) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1232055 + ... + 1232763.

It is an arithmetic number, because the mean of its divisors is an integer number (38876760).

Almost surely, 2^873777981 is an apocalyptic number.

It is an amenable number.

873777981 is a deficient number, since it is larger than the sum of its proper divisors (370278339).

873777981 is a wasteful number, since it uses less digits than its factorization.

873777981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1125.

The product of its digits is 4148928, while the sum is 57.

The square root of 873777981 is about 29559.7358073444. The cubic root of 873777981 is about 956.0201195120.

The spelling of 873777981 in words is "eight hundred seventy-three million, seven hundred seventy-seven thousand, nine hundred eighty-one".