87723867 has 24 divisors (see below), whose sum is σ = 148433472. Its totient is φ = 45570000.

The previous prime is 87723833. The next prime is 87723901. The reversal of 87723867 is 76832778.

It is an interprime number because it is at equal distance from previous prime (87723833) and next prime (87723901).

It is not a de Polignac number, because 87723867 - 2⁶ = 87723803 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87725867) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 25509 + ... + 28742.

It is an arithmetic number, because the mean of its divisors is an integer number (6184728).

Almost surely, 2^87723867 is an apocalyptic number.

87723867 is a deficient number, since it is larger than the sum of its proper divisors (60709605).

87723867 is a wasteful number, since it uses less digits than its factorization.

87723867 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 54279 (or 54272 counting only the distinct ones).

The product of its digits is 790272, while the sum is 48.

The square root of 87723867 is about 9366.1020173816. The cubic root of 87723867 is about 444.3302925423.

It can be divided in two parts, 87723 and 867, that multiplied together give a square (76055841 = 8721²).

The spelling of 87723867 in words is "eighty-seven million, seven hundred twenty-three thousand, eight hundred sixty-seven".