87161955 has 16 divisors (see below), whose sum is σ = 139580160. Its totient is φ = 46446048.

The previous prime is 87161953. The next prime is 87161957. The reversal of 87161955 is 55916178.

It is an interprime number because it is at equal distance from previous prime (87161953) and next prime (87161957).

It is not a de Polignac number, because 87161955 - 2¹ = 87161953 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87161951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25116 + ... + 28374.

It is an arithmetic number, because the mean of its divisors is an integer number (8723760).

Almost surely, 2^87161955 is an apocalyptic number.

87161955 is a deficient number, since it is larger than the sum of its proper divisors (52418205).

87161955 is a wasteful number, since it uses less digits than its factorization.

87161955 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5050.

The product of its digits is 75600, while the sum is 42.

The square root of 87161955 is about 9336.0567157660. The cubic root of 87161955 is about 443.3795458765.

It can be divided in two parts, 871 and 61955, that added together give a palindrome (62826).

The spelling of 87161955 in words is "eighty-seven million, one hundred sixty-one thousand, nine hundred fifty-five".