721463117 has 4 divisors (see below), whose sum is σ = 759434880. Its totient is φ = 683491356.

The previous prime is 721463089. The next prime is 721463137. The reversal of 721463117 is 711364127.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 711364127 = 61 ⋅11661707.

It is a cyclic number.

It is not a de Polignac number, because 721463117 - 2¹⁶ = 721397581 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (721463137) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18985853 + ... + 18985890.

It is an arithmetic number, because the mean of its divisors is an integer number (189858720).

Almost surely, 2^721463117 is an apocalyptic number.

It is an amenable number.

721463117 is a deficient number, since it is larger than the sum of its proper divisors (37971763).

721463117 is a wasteful number, since it uses less digits than its factorization.

721463117 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 37971762.

The product of its digits is 7056, while the sum is 32.

The square root of 721463117 is about 26860.0654690192. The cubic root of 721463117 is about 896.8876514494.

The spelling of 721463117 in words is "seven hundred twenty-one million, four hundred sixty-three thousand, one hundred seventeen".