72707987 has 8 divisors (see below), whose sum is σ = 79382640. Its totient is φ = 66044160.

The previous prime is 72707953. The next prime is 72708007. The reversal of 72707987 is 78970727.

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 72707987 - 2¹⁸ = 72445843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72707287) 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, 18839 + ... + 22367.

It is an arithmetic number, because the mean of its divisors is an integer number (9922830).

Almost surely, 2^72707987 is an apocalyptic number.

72707987 is a deficient number, since it is larger than the sum of its proper divisors (6674653).

72707987 is a wasteful number, since it uses less digits than its factorization.

72707987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5413.

The product of its (nonzero) digits is 345744, while the sum is 47.

The square root of 72707987 is about 8526.8978532641. The cubic root of 72707987 is about 417.3759048875.

The spelling of 72707987 in words is "seventy-two million, seven hundred seven thousand, nine hundred eighty-seven".