72986387 has 2 divisors, whose sum is σ = 72986388. Its totient is φ = 72986386.

The previous prime is 72986371. The next prime is 72986393. The reversal of 72986387 is 78368927.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 72986387 - 2⁴ = 72986371 is a prime.

It is not a weakly prime, because it can be changed into another prime (72986357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36493193 + 36493194.

It is an arithmetic number, because the mean of its divisors is an integer number (36493194).

Almost surely, 2^72986387 is an apocalyptic number.

72986387 is a deficient number, since it is larger than the sum of its proper divisors (1).

72986387 is an equidigital number, since it uses as much as digits as its factorization.

72986387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 50.

The square root of 72986387 is about 8543.2070676064. The cubic root of 72986387 is about 417.9079393270.

The spelling of 72986387 in words is "seventy-two million, nine hundred eighty-six thousand, three hundred eighty-seven".