72972275 has 6 divisors (see below), whose sum is σ = 90485652. Its totient is φ = 58377800.

The previous prime is 72972271. The next prime is 72972299. The reversal of 72972275 is 57227927.

It is not a de Polignac number, because 72972275 - 2² = 72972271 is a prime.

It is a super-4 number, since 4×72972275⁴ (a number of 33 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72972271) 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 5 ways as a sum of consecutive naturals, for example, 1459421 + ... + 1459470.

It is an arithmetic number, because the mean of its divisors is an integer number (15080942).

Almost surely, 2^72972275 is an apocalyptic number.

72972275 is a deficient number, since it is larger than the sum of its proper divisors (17513377).

72972275 is a wasteful number, since it uses less digits than its factorization.

72972275 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2918901 (or 2918896 counting only the distinct ones).

The product of its digits is 123480, while the sum is 41.

The square root of 72972275 is about 8542.3811083327. The cubic root of 72972275 is about 417.8810032676.

The spelling of 72972275 in words is "seventy-two million, nine hundred seventy-two thousand, two hundred seventy-five".