87261871 has 2 divisors, whose sum is σ = 87261872. Its totient is φ = 87261870.

The previous prime is 87261857. The next prime is 87261883. The reversal of 87261871 is 17816278.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 87261871 - 2⁷ = 87261743 is a prime.

It is a super-2 number, since 2×87261871² = 15229268260841282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87261821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43630935 + 43630936.

It is an arithmetic number, because the mean of its divisors is an integer number (43630936).

Almost surely, 2^87261871 is an apocalyptic number.

87261871 is a deficient number, since it is larger than the sum of its proper divisors (1).

87261871 is an equidigital number, since it uses as much as digits as its factorization.

87261871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 37632, while the sum is 40.

The square root of 87261871 is about 9341.4062645835. The cubic root of 87261871 is about 443.5489003224.

The spelling of 87261871 in words is "eighty-seven million, two hundred sixty-one thousand, eight hundred seventy-one".