87374891 has 2 divisors, whose sum is σ = 87374892. Its totient is φ = 87374890.

The previous prime is 87374887. The next prime is 87374893. The reversal of 87374891 is 19847378.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87374891 - 2² = 87374887 is a prime.

Together with 87374893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87374893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43687445 + 43687446.

It is an arithmetic number, because the mean of its divisors is an integer number (43687446).

Almost surely, 2^87374891 is an apocalyptic number.

87374891 is a deficient number, since it is larger than the sum of its proper divisors (1).

87374891 is an equidigital number, since it uses as much as digits as its factorization.

87374891 is an evil number, because the sum of its binary digits is even.

The product of its digits is 338688, while the sum is 47.

The square root of 87374891 is about 9347.4537174570. The cubic root of 87374891 is about 443.7403098856.

The spelling of 87374891 in words is "eighty-seven million, three hundred seventy-four thousand, eight hundred ninety-one".