87847897 has 2 divisors, whose sum is σ = 87847898. Its totient is φ = 87847896.

The previous prime is 87847889. The next prime is 87847901. The reversal of 87847897 is 79874878.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 79227801 + 8620096 = 8901^2 + 2936^2 .

It is a cyclic number.

It is not a de Polignac number, because 87847897 - 2³ = 87847889 is a prime.

It is a super-3 number, since 3×87847897³ (a number of 25 digits) contains 333 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (87842897) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43923948 + 43923949.

It is an arithmetic number, because the mean of its divisors is an integer number (43923949).

Almost surely, 2^87847897 is an apocalyptic number.

It is an amenable number.

87847897 is a deficient number, since it is larger than the sum of its proper divisors (1).

87847897 is an equidigital number, since it uses as much as digits as its factorization.

87847897 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6322176, while the sum is 58.

The square root of 87847897 is about 9372.7208963033. The cubic root of 87847897 is about 444.5396021086.

The spelling of 87847897 in words is "eighty-seven million, eight hundred forty-seven thousand, eight hundred ninety-seven".