87193487 has 2 divisors, whose sum is σ = 87193488. Its totient is φ = 87193486.

The previous prime is 87193439. The next prime is 87193523. The reversal of 87193487 is 78439178.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87193487 - 2¹⁸ = 86931343 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87193417) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43596743 + 43596744.

It is an arithmetic number, because the mean of its divisors is an integer number (43596744).

Almost surely, 2^87193487 is an apocalyptic number.

87193487 is a deficient number, since it is larger than the sum of its proper divisors (1).

87193487 is an equidigital number, since it uses as much as digits as its factorization.

87193487 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 87193487 is about 9337.7452845963. The cubic root of 87193487 is about 443.4330055856.

The spelling of 87193487 in words is "eighty-seven million, one hundred ninety-three thousand, four hundred eighty-seven".