722650961 has 8 divisors (see below), whose sum is σ = 754555200. Its totient is φ = 690787152.

The previous prime is 722650891. The next prime is 722650967. The reversal of 722650961 is 169056227.

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 722650961 - 2²² = 718456657 is a prime.

It is a super-2 number, since 2×722650961² = 1044448822868447042, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (722650967) 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, 29831 + ... + 48323.

It is an arithmetic number, because the mean of its divisors is an integer number (94319400).

Almost surely, 2^722650961 is an apocalyptic number.

It is an amenable number.

722650961 is a deficient number, since it is larger than the sum of its proper divisors (31904239).

722650961 is a wasteful number, since it uses less digits than its factorization.

722650961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20215.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 722650961 is about 26882.1680859264. The cubic root of 722650961 is about 897.3796047409.

The spelling of 722650961 in words is "seven hundred twenty-two million, six hundred fifty thousand, nine hundred sixty-one".