977853 has 4 divisors (see below), whose sum is σ = 1303808. Its totient is φ = 651900.

The previous prime is 977849. The next prime is 977861. The reversal of 977853 is 358779.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 977853 - 2² = 977849 is a prime.

It is a D-number.

It is a Duffinian number.

977853 is a lucky number.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 977853.

It is not an unprimeable number, because it can be changed into a prime (977803) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 162973 + ... + 162978.

It is an arithmetic number, because the mean of its divisors is an integer number (325952).

2⁹⁷⁷⁸⁵³ is an apocalyptic number.

It is an amenable number.

977853 is a deficient number, since it is larger than the sum of its proper divisors (325955).

977853 is a wasteful number, since it uses less digits than its factorization.

977853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325954.

The product of its digits is 52920, while the sum is 39.

The square root of 977853 is about 988.8645003235. The cubic root of 977853 is about 99.2562487209.

It can be divided in two parts, 977 and 853, that added together give a triangular number (1830 = T₆₀).

The spelling of 977853 in words is "nine hundred seventy-seven thousand, eight hundred fifty-three".