77453923 has 2 divisors, whose sum is σ = 77453924. Its totient is φ = 77453922.

The previous prime is 77453917. The next prime is 77453927. The reversal of 77453923 is 32935477.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-77453923 is a prime.

It is a super-2 number, since 2×77453923² = 11998220376179858, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (77453927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38726961 + 38726962.

It is an arithmetic number, because the mean of its divisors is an integer number (38726962).

Almost surely, 2^77453923 is an apocalyptic number.

77453923 is a deficient number, since it is larger than the sum of its proper divisors (1).

77453923 is an equidigital number, since it uses as much as digits as its factorization.

77453923 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 158760, while the sum is 40.

The square root of 77453923 is about 8800.7910439914. The cubic root of 77453923 is about 426.2664379072.

The spelling of 77453923 in words is "seventy-seven million, four hundred fifty-three thousand, nine hundred twenty-three".