72573569 has 2 divisors, whose sum is σ = 72573570. Its totient is φ = 72573568.

The previous prime is 72573541. The next prime is 72573577. The reversal of 72573569 is 96537527.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 72471169 + 102400 = 8513^2 + 320^2 .

It is a cyclic number.

It is not a de Polignac number, because 72573569 - 2⁸ = 72573313 is a prime.

It is a super-2 number, since 2×72573569² = 10533845834795522, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (72503569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36286784 + 36286785.

It is an arithmetic number, because the mean of its divisors is an integer number (36286785).

Almost surely, 2^72573569 is an apocalyptic number.

It is an amenable number.

72573569 is a deficient number, since it is larger than the sum of its proper divisors (1).

72573569 is an equidigital number, since it uses as much as digits as its factorization.

72573569 is an evil number, because the sum of its binary digits is even.

The product of its digits is 396900, while the sum is 44.

The square root of 72573569 is about 8519.0122079969. The cubic root of 72573569 is about 417.1185400257.

The spelling of 72573569 in words is "seventy-two million, five hundred seventy-three thousand, five hundred sixty-nine".