728787571 has 2 divisors, whose sum is σ = 728787572. Its totient is φ = 728787570.

The previous prime is 728787547. The next prime is 728787599. The reversal of 728787571 is 175787827.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 728787571 - 2¹³ = 728779379 is a prime.

It is a super-2 number, since 2×728787571² = 1062262647288160082, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (728787071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364393785 + 364393786.

It is an arithmetic number, because the mean of its divisors is an integer number (364393786).

Almost surely, 2^728787571 is an apocalyptic number.

728787571 is a deficient number, since it is larger than the sum of its proper divisors (1).

728787571 is an equidigital number, since it uses as much as digits as its factorization.

728787571 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1536640, while the sum is 52.

The square root of 728787571 is about 26996.0658430076. The cubic root of 728787571 is about 899.9125721658.

The spelling of 728787571 in words is "seven hundred twenty-eight million, seven hundred eighty-seven thousand, five hundred seventy-one".