721701001 has 8 divisors (see below), whose sum is σ = 826286400. Its totient is φ = 617486928.

The previous prime is 721700981. The next prime is 721701037. The reversal of 721701001 is 100107127.

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

It is a cyclic number.

It is not a de Polignac number, because 721701001 - 2¹³ = 721692809 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 721701001.

It is not an unprimeable number, because it can be changed into a prime (721701041) 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, 88651 + ... + 96448.

It is an arithmetic number, because the mean of its divisors is an integer number (103285800).

Almost surely, 2^721701001 is an apocalyptic number.

It is an amenable number.

721701001 is a deficient number, since it is larger than the sum of its proper divisors (104585399).

721701001 is a wasteful number, since it uses less digits than its factorization.

721701001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185663.

The product of its (nonzero) digits is 98, while the sum is 19.

The square root of 721701001 is about 26864.4933136659. The cubic root of 721701001 is about 896.9862158675.

Adding to 721701001 its reverse (100107127), we get a palindrome (821808128).

The spelling of 721701001 in words is "seven hundred twenty-one million, seven hundred one thousand, one".