78987323 has 2 divisors, whose sum is σ = 78987324. Its totient is φ = 78987322.

The previous prime is 78987319. The next prime is 78987379. The reversal of 78987323 is 32378987.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (32378987) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 78987323 - 2² = 78987319 is a prime.

It is not a weakly prime, because it can be changed into another prime (78987383) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39493661 + 39493662.

It is an arithmetic number, because the mean of its divisors is an integer number (39493662).

Almost surely, 2^78987323 is an apocalyptic number.

78987323 is a deficient number, since it is larger than the sum of its proper divisors (1).

78987323 is an equidigital number, since it uses as much as digits as its factorization.

78987323 is an evil number, because the sum of its binary digits is even.

The product of its digits is 508032, while the sum is 47.

The square root of 78987323 is about 8887.4812517383. The cubic root of 78987323 is about 429.0610900048.

The spelling of 78987323 in words is "seventy-eight million, nine hundred eighty-seven thousand, three hundred twenty-three".