721360897 has 8 divisors (see below), whose sum is σ = 760037760. Its totient is φ = 682755120.

The previous prime is 721360883. The next prime is 721360903. The reversal of 721360897 is 798063127.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 721360897 - 2¹¹ = 721358849 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (721360817) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3747 + ... + 38167.

It is an arithmetic number, because the mean of its divisors is an integer number (95004720).

Almost surely, 2^721360897 is an apocalyptic number.

It is an amenable number.

721360897 is a deficient number, since it is larger than the sum of its proper divisors (38676863).

721360897 is a wasteful number, since it uses less digits than its factorization.

721360897 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35543.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 721360897 is about 26858.1625767661. The cubic root of 721360897 is about 896.8452911477.

The spelling of 721360897 in words is "seven hundred twenty-one million, three hundred sixty thousand, eight hundred ninety-seven".