87948491 has 2 divisors, whose sum is σ = 87948492. Its totient is φ = 87948490.

The previous prime is 87948479. The next prime is 87948493. The reversal of 87948491 is 19484978.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87948491 is a prime.

Together with 87948493, 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 (87948493) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43974245 + 43974246.

It is an arithmetic number, because the mean of its divisors is an integer number (43974246).

Almost surely, 2^87948491 is an apocalyptic number.

87948491 is a deficient number, since it is larger than the sum of its proper divisors (1).

87948491 is an equidigital number, since it uses as much as digits as its factorization.

87948491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 580608, while the sum is 50.

The square root of 87948491 is about 9378.0856788579. The cubic root of 87948491 is about 444.7092170922.

The spelling of 87948491 in words is "eighty-seven million, nine hundred forty-eight thousand, four hundred ninety-one".