87978367 has 2 divisors, whose sum is σ = 87978368. Its totient is φ = 87978366.

The previous prime is 87978347. The next prime is 87978419. The reversal of 87978367 is 76387978.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87978367 - 2²³ = 79589759 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87978307) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43989183 + 43989184.

It is an arithmetic number, because the mean of its divisors is an integer number (43989184).

Almost surely, 2^87978367 is an apocalyptic number.

87978367 is a deficient number, since it is larger than the sum of its proper divisors (1).

87978367 is an equidigital number, since it uses as much as digits as its factorization.

87978367 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3556224, while the sum is 55.

The square root of 87978367 is about 9379.6784060009. The cubic root of 87978367 is about 444.7595671258.

The spelling of 87978367 in words is "eighty-seven million, nine hundred seventy-eight thousand, three hundred sixty-seven".