87397841 has 4 divisors (see below), whose sum is σ = 87880884. Its totient is φ = 86914800.

The previous prime is 87397837. The next prime is 87397847. The reversal of 87397841 is 14879378.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 43890625 + 43507216 = 6625^2 + 6596^2 .

It is a cyclic number.

It is not a de Polignac number, because 87397841 - 2² = 87397837 is a prime.

It is a super-2 number, since 2×87397841² = 15276765222922562, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87397847) 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, 241250 + ... + 241611.

It is an arithmetic number, because the mean of its divisors is an integer number (21970221).

Almost surely, 2^87397841 is an apocalyptic number.

It is an amenable number.

87397841 is a deficient number, since it is larger than the sum of its proper divisors (483043).

87397841 is a wasteful number, since it uses less digits than its factorization.

87397841 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 483042.

The product of its digits is 338688, while the sum is 47.

The square root of 87397841 is about 9348.6812438975. The cubic root of 87397841 is about 443.7791576159.

The spelling of 87397841 in words is "eighty-seven million, three hundred ninety-seven thousand, eight hundred forty-one".