87969947 has 8 divisors (see below), whose sum is σ = 96753216. Its totient is φ = 79474752.

The previous prime is 87969941. The next prime is 87969949. The reversal of 87969947 is 74996978.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 87969947 - 2⁸ = 87969691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87969941) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 71378 + ... + 72599.

It is an arithmetic number, because the mean of its divisors is an integer number (12094152).

Almost surely, 2^87969947 is an apocalyptic number.

87969947 is a deficient number, since it is larger than the sum of its proper divisors (8783269).

87969947 is a wasteful number, since it uses less digits than its factorization.

87969947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 144037.

The product of its digits is 6858432, while the sum is 59.

The square root of 87969947 is about 9379.2295525805. The cubic root of 87969947 is about 444.7453780505.

The spelling of 87969947 in words is "eighty-seven million, nine hundred sixty-nine thousand, nine hundred forty-seven".