724307961 has 16 divisors (see below), whose sum is σ = 1057085120. Its totient is φ = 438419520.

The previous prime is 724307951. The next prime is 724307977. The reversal of 724307961 is 169703427.

It is not a de Polignac number, because 724307961 - 2⁷ = 724307833 is a prime.

It is a Smith number, since the sum of its digits (39) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is not an unprimeable number, because it can be changed into a prime (724307921) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 149851 + ... + 154608.

It is an arithmetic number, because the mean of its divisors is an integer number (66067820).

Almost surely, 2^724307961 is an apocalyptic number.

It is an amenable number.

724307961 is a deficient number, since it is larger than the sum of its proper divisors (332777159).

724307961 is a wasteful number, since it uses less digits than its factorization.

724307961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 304536.

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 724307961 is about 26912.9701259449. The cubic root of 724307961 is about 898.0649623228.

The spelling of 724307961 in words is "seven hundred twenty-four million, three hundred seven thousand, nine hundred sixty-one".