87874393 has 2 divisors, whose sum is σ = 87874394. Its totient is φ = 87874392.

The previous prime is 87874333. The next prime is 87874433. The reversal of 87874393 is 39347878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79423744 + 8450649 = 8912^2 + 2907^2 .

It is a cyclic number.

It is not a de Polignac number, because 87874393 - 2⁹ = 87873881 is a prime.

It is a plaindrome in base 15.

It is not a weakly prime, because it can be changed into another prime (87874333) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43937196 + 43937197.

It is an arithmetic number, because the mean of its divisors is an integer number (43937197).

Almost surely, 2^87874393 is an apocalyptic number.

It is an amenable number.

87874393 is a deficient number, since it is larger than the sum of its proper divisors (1).

87874393 is an equidigital number, since it uses as much as digits as its factorization.

87874393 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1016064, while the sum is 49.

The square root of 87874393 is about 9374.1342533591. The cubic root of 87874393 is about 444.5842904761.

It can be divided in two parts, 8787 and 4393, that multiplied together give a triangular number (38601291 = T₈₇₈₆).

The spelling of 87874393 in words is "eighty-seven million, eight hundred seventy-four thousand, three hundred ninety-three".