728591251 has 2 divisors, whose sum is σ = 728591252. Its totient is φ = 728591250.

The previous prime is 728591191. The next prime is 728591257. The reversal of 728591251 is 152195827.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 728591251 - 2¹¹ = 728589203 is a prime.

It is a super-2 number, since 2×728591251² = 1061690422067490002, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (728591257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364295625 + 364295626.

It is an arithmetic number, because the mean of its divisors is an integer number (364295626).

Almost surely, 2^728591251 is an apocalyptic number.

728591251 is a deficient number, since it is larger than the sum of its proper divisors (1).

728591251 is an equidigital number, since it uses as much as digits as its factorization.

728591251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 40.

The square root of 728591251 is about 26992.4295127356. The cubic root of 728591251 is about 899.8317590869.

The spelling of 728591251 in words is "seven hundred twenty-eight million, five hundred ninety-one thousand, two hundred fifty-one".