42977923 has 2 divisors, whose sum is σ = 42977924. Its totient is φ = 42977922.

The previous prime is 42977917. The next prime is 42977929. The reversal of 42977923 is 32977924.

It is a happy number.

42977923 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (42977917) and next prime (42977929).

It is a cyclic number.

It is not a de Polignac number, because 42977923 - 2²¹ = 40880771 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42977923.

It is not a weakly prime, because it can be changed into another prime (42977929) by changing a digit.

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 as a sum of consecutive naturals, namely, 21488961 + 21488962.

It is an arithmetic number, because the mean of its divisors is an integer number (21488962).

Almost surely, 2^42977923 is an apocalyptic number.

42977923 is a deficient number, since it is larger than the sum of its proper divisors (1).

42977923 is an equidigital number, since it uses as much as digits as its factorization.

42977923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 190512, while the sum is 43.

The square root of 42977923 is about 6555.7549527114. The cubic root of 42977923 is about 350.2798387833.

Subtracting from 42977923 its reverse (32977924), we obtain a palindrome (9999999).

The spelling of 42977923 in words is "forty-two million, nine hundred seventy-seven thousand, nine hundred twenty-three".