721467601 has 4 divisors (see below), whose sum is σ = 759439600. Its totient is φ = 683495604.

The previous prime is 721467599. The next prime is 721467613. The reversal of 721467601 is 106764127.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 721467601 - 2¹ = 721467599 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (721467001) 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, 18985971 + ... + 18986008.

It is an arithmetic number, because the mean of its divisors is an integer number (189859900).

Almost surely, 2^721467601 is an apocalyptic number.

It is an amenable number.

721467601 is a deficient number, since it is larger than the sum of its proper divisors (37971999).

721467601 is a wasteful number, since it uses less digits than its factorization.

721467601 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37971998.

The product of its (nonzero) digits is 14112, while the sum is 34.

The square root of 721467601 is about 26860.1489385297. The cubic root of 721467601 is about 896.8895095420.

The spelling of 721467601 in words is "seven hundred twenty-one million, four hundred sixty-seven thousand, six hundred one".