728474251 has 2 divisors, whose sum is σ = 728474252. Its totient is φ = 728474250.

The previous prime is 728474249. The next prime is 728474273. The reversal of 728474251 is 152474827.

It is a weak prime.

It is an emirp because it is prime and its reverse (152474827) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 728474251 - 2¹ = 728474249 is a prime.

It is a super-2 number, since 2×728474251² = 1061349468740022002, which contains 22 as substring.

Together with 728474249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (728474281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364237125 + 364237126.

It is an arithmetic number, because the mean of its divisors is an integer number (364237126).

Almost surely, 2^728474251 is an apocalyptic number.

728474251 is a deficient number, since it is larger than the sum of its proper divisors (1).

728474251 is an equidigital number, since it uses as much as digits as its factorization.

728474251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 125440, while the sum is 40.

The square root of 728474251 is about 26990.2621513760. The cubic root of 728474251 is about 899.7835903542.

The spelling of 728474251 in words is "seven hundred twenty-eight million, four hundred seventy-four thousand, two hundred fifty-one".