87672839 has 2 divisors, whose sum is σ = 87672840. Its totient is φ = 87672838.

The previous prime is 87672811. The next prime is 87672841. The reversal of 87672839 is 93827678.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87672839 - 2⁸ = 87672583 is a prime.

It is a Sophie Germain prime.

Together with 87672841, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87672889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43836419 + 43836420.

It is an arithmetic number, because the mean of its divisors is an integer number (43836420).

Almost surely, 2^87672839 is an apocalyptic number.

87672839 is a deficient number, since it is larger than the sum of its proper divisors (1).

87672839 is an equidigital number, since it uses as much as digits as its factorization.

87672839 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 87672839 is about 9363.3775423188. The cubic root of 87672839 is about 444.2441218318.

The spelling of 87672839 in words is "eighty-seven million, six hundred seventy-two thousand, eight hundred thirty-nine".