721014253 has 2 divisors, whose sum is σ = 721014254. Its totient is φ = 721014252.

The previous prime is 721014209. The next prime is 721014293. The reversal of 721014253 is 352410127.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 529828324 + 191185929 = 23018^2 + 13827^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-721014253 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (721014293) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360507126 + 360507127.

It is an arithmetic number, because the mean of its divisors is an integer number (360507127).

Almost surely, 2^721014253 is an apocalyptic number.

It is an amenable number.

721014253 is a deficient number, since it is larger than the sum of its proper divisors (1).

721014253 is an equidigital number, since it uses as much as digits as its factorization.

721014253 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1680, while the sum is 25.

The square root of 721014253 is about 26851.7085676126. The cubic root of 721014253 is about 896.7016109401.

The spelling of 721014253 in words is "seven hundred twenty-one million, fourteen thousand, two hundred fifty-three".