87297971 has 2 divisors, whose sum is σ = 87297972. Its totient is φ = 87297970.

The previous prime is 87297967. The next prime is 87298021. The reversal of 87297971 is 17979278.

It is an a-pointer prime, because the next prime (87298021) can be obtained adding 87297971 to its sum of digits (50).

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 87297971 - 2² = 87297967 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87297961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43648985 + 43648986.

It is an arithmetic number, because the mean of its divisors is an integer number (43648986).

Almost surely, 2^87297971 is an apocalyptic number.

87297971 is a deficient number, since it is larger than the sum of its proper divisors (1).

87297971 is an equidigital number, since it uses as much as digits as its factorization.

87297971 is an evil number, because the sum of its binary digits is even.

The product of its digits is 444528, while the sum is 50.

The square root of 87297971 is about 9343.3383220346. The cubic root of 87297971 is about 443.6100568832.

The spelling of 87297971 in words is "eighty-seven million, two hundred ninety-seven thousand, nine hundred seventy-one".