87140161 has 4 divisors (see below), whose sum is σ = 87826432. Its totient is φ = 86453892.

The previous prime is 87140153. The next prime is 87140171. The reversal of 87140161 is 16104178.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 16104178 = 2 ⋅8052089.

It is a cyclic number.

It is not a de Polignac number, because 87140161 - 2³ = 87140153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87140111) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 342945 + ... + 343198.

It is an arithmetic number, because the mean of its divisors is an integer number (21956608).

Almost surely, 2^87140161 is an apocalyptic number.

It is an amenable number.

87140161 is a deficient number, since it is larger than the sum of its proper divisors (686271).

87140161 is a wasteful number, since it uses less digits than its factorization.

87140161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 686270.

The product of its (nonzero) digits is 1344, while the sum is 28.

The square root of 87140161 is about 9334.8894476582. The cubic root of 87140161 is about 443.3425885468.

The spelling of 87140161 in words is "eighty-seven million, one hundred forty thousand, one hundred sixty-one".