977923 has 2 divisors, whose sum is σ = 977924. Its totient is φ = 977922.

The previous prime is 977897. The next prime is 977927. The reversal of 977923 is 329779.

977923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is an emirp because it is prime and its reverse (329779) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 977923 - 2⁹ = 977411 is a prime.

It is an Ulam number.

It is not a weakly prime, because it can be changed into another prime (977927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 488961 + 488962.

It is an arithmetic number, because the mean of its divisors is an integer number (488962).

2⁹⁷⁷⁹²³ is an apocalyptic number.

977923 is a deficient number, since it is larger than the sum of its proper divisors (1).

977923 is an equidigital number, since it uses as much as digits as its factorization.

977923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 23814, while the sum is 37.

The square root of 977923 is about 988.8998938214. The cubic root of 977923 is about 99.2586170973.

The spelling of 977923 in words is "nine hundred seventy-seven thousand, nine hundred twenty-three".