72951987 has 8 divisors (see below), whose sum is σ = 97813440. Its totient is φ = 48362600.

The previous prime is 72951971. The next prime is 72952013. The reversal of 72951987 is 78915927.

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

It is a cyclic number.

It is not a de Polignac number, because 72951987 - 2⁴ = 72951971 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72951917) 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, 67389 + ... + 68462.

It is an arithmetic number, because the mean of its divisors is an integer number (12226680).

Almost surely, 2^72951987 is an apocalyptic number.

72951987 is a deficient number, since it is larger than the sum of its proper divisors (24861453).

72951987 is a wasteful number, since it uses less digits than its factorization.

72951987 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 136033.

The product of its digits is 317520, while the sum is 48.

The square root of 72951987 is about 8541.1935348638. The cubic root of 72951987 is about 417.8422727789.

The spelling of 72951987 in words is "seventy-two million, nine hundred fifty-one thousand, nine hundred eighty-seven".