724271987 has 2 divisors, whose sum is σ = 724271988. Its totient is φ = 724271986.

The previous prime is 724271959. The next prime is 724272007. The reversal of 724271987 is 789172427.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 724271987 - 2⁸ = 724271731 is a prime.

It is a super-2 number, since 2×724271987² = 1049139822305856338, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (724271287) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 362135993 + 362135994.

It is an arithmetic number, because the mean of its divisors is an integer number (362135994).

Almost surely, 2^724271987 is an apocalyptic number.

724271987 is a deficient number, since it is larger than the sum of its proper divisors (1).

724271987 is an equidigital number, since it uses as much as digits as its factorization.

724271987 is an evil number, because the sum of its binary digits is even.

The product of its digits is 395136, while the sum is 47.

The square root of 724271987 is about 26912.3017781832. The cubic root of 724271987 is about 898.0500940965.

The spelling of 724271987 in words is "seven hundred twenty-four million, two hundred seventy-one thousand, nine hundred eighty-seven".