728280131 has 2 divisors, whose sum is σ = 728280132. Its totient is φ = 728280130.

The previous prime is 728280079. The next prime is 728280149. The reversal of 728280131 is 131082827.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 728280131 - 2²² = 724085827 is a prime.

It is a super-2 number, since 2×728280131² = 1060783898418754322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (728280331) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 364140065 + 364140066.

It is an arithmetic number, because the mean of its divisors is an integer number (364140066).

Almost surely, 2^728280131 is an apocalyptic number.

728280131 is a deficient number, since it is larger than the sum of its proper divisors (1).

728280131 is an equidigital number, since it uses as much as digits as its factorization.

728280131 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 32.

The square root of 728280131 is about 26986.6657999835. The cubic root of 728280131 is about 899.7036600490.

The spelling of 728280131 in words is "seven hundred twenty-eight million, two hundred eighty thousand, one hundred thirty-one".