72775523 has 2 divisors, whose sum is σ = 72775524. Its totient is φ = 72775522.

The previous prime is 72775499. The next prime is 72775531. The reversal of 72775523 is 32557727.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72775523 - 2⁶ = 72775459 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (72775553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36387761 + 36387762.

It is an arithmetic number, because the mean of its divisors is an integer number (36387762).

Almost surely, 2^72775523 is an apocalyptic number.

72775523 is a deficient number, since it is larger than the sum of its proper divisors (1).

72775523 is an equidigital number, since it uses as much as digits as its factorization.

72775523 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 102900, while the sum is 38.

The square root of 72775523 is about 8530.8571081691. The cubic root of 72775523 is about 417.5050937024.

The spelling of 72775523 in words is "seventy-two million, seven hundred seventy-five thousand, five hundred twenty-three".