72942961 has 8 divisors (see below), whose sum is σ = 89776064. Its totient is φ = 57713040.

The previous prime is 72942953. The next prime is 72942979. The reversal of 72942961 is 16924927.

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

It is not a de Polignac number, because 72942961 - 2³ = 72942953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72942941) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 400695 + ... + 400876.

It is an arithmetic number, because the mean of its divisors is an integer number (11222008).

Almost surely, 2^72942961 is an apocalyptic number.

It is an amenable number.

72942961 is a deficient number, since it is larger than the sum of its proper divisors (16833103).

72942961 is a wasteful number, since it uses less digits than its factorization.

72942961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 801591.

The product of its digits is 54432, while the sum is 40.

The square root of 72942961 is about 8540.6651380323. The cubic root of 72942961 is about 417.8250395270.

The spelling of 72942961 in words is "seventy-two million, nine hundred forty-two thousand, nine hundred sixty-one".