72743899 has 2 divisors, whose sum is σ = 72743900. Its totient is φ = 72743898.

The previous prime is 72743857. The next prime is 72743927. The reversal of 72743899 is 99834727.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72743899 - 2⁷ = 72743771 is a prime.

It is not a weakly prime, because it can be changed into another prime (72743819) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36371949 + 36371950.

It is an arithmetic number, because the mean of its divisors is an integer number (36371950).

Almost surely, 2^72743899 is an apocalyptic number.

72743899 is a deficient number, since it is larger than the sum of its proper divisors (1).

72743899 is an equidigital number, since it uses as much as digits as its factorization.

72743899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 762048, while the sum is 49.

The square root of 72743899 is about 8529.0034001635. The cubic root of 72743899 is about 417.4446104820. Note that the first 3 decimals are identical.

The spelling of 72743899 in words is "seventy-two million, seven hundred forty-three thousand, eight hundred ninety-nine".