87941971 has 4 divisors (see below), whose sum is σ = 94706752. Its totient is φ = 81177192.

The previous prime is 87941951. The next prime is 87941981. The reversal of 87941971 is 17914978.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 17914978 = 2 ⋅8957489.

It is a cyclic number.

It is not a de Polignac number, because 87941971 - 2¹³ = 87933779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87941951) 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, 3382371 + ... + 3382396.

It is an arithmetic number, because the mean of its divisors is an integer number (23676688).

Almost surely, 2^87941971 is an apocalyptic number.

87941971 is a deficient number, since it is larger than the sum of its proper divisors (6764781).

87941971 is a wasteful number, since it uses less digits than its factorization.

87941971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6764780.

The product of its digits is 127008, while the sum is 46.

The square root of 87941971 is about 9377.7380534967. The cubic root of 87941971 is about 444.6982274182.

The spelling of 87941971 in words is "eighty-seven million, nine hundred forty-one thousand, nine hundred seventy-one".