77440043 has 2 divisors, whose sum is σ = 77440044. Its totient is φ = 77440042.

The previous prime is 77439997. The next prime is 77440061. The reversal of 77440043 is 34004477.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77440043 - 2¹² = 77435947 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 77439988 and 77440015.

It is not a weakly prime, because it can be changed into another prime (77410043) 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, 38720021 + 38720022.

It is an arithmetic number, because the mean of its divisors is an integer number (38720022).

Almost surely, 2^77440043 is an apocalyptic number.

77440043 is a deficient number, since it is larger than the sum of its proper divisors (1).

77440043 is an equidigital number, since it uses as much as digits as its factorization.

77440043 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 29.

The square root of 77440043 is about 8800.0024431815. The cubic root of 77440043 is about 426.2409735994.

The spelling of 77440043 in words is "seventy-seven million, four hundred forty thousand, forty-three".