721172059 has 4 divisors (see below), whose sum is σ = 721629216. Its totient is φ = 720714904.

The previous prime is 721172057. The next prime is 721172071. The reversal of 721172059 is 950271127.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 721172059 - 2¹ = 721172057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (721172057) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226204 + ... + 229369.

It is an arithmetic number, because the mean of its divisors is an integer number (180407304).

Almost surely, 2^721172059 is an apocalyptic number.

721172059 is a deficient number, since it is larger than the sum of its proper divisors (457157).

721172059 is a wasteful number, since it uses less digits than its factorization.

721172059 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 457156.

The product of its (nonzero) digits is 8820, while the sum is 34.

The square root of 721172059 is about 26854.6468790785. The cubic root of 721172059 is about 896.7670255379.

The spelling of 721172059 in words is "seven hundred twenty-one million, one hundred seventy-two thousand, fifty-nine".