87397837 has 2 divisors, whose sum is σ = 87397838. Its totient is φ = 87397836.

The previous prime is 87397823. The next prime is 87397847. The reversal of 87397837 is 73879378.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 84107241 + 3290596 = 9171^2 + 1814^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87397837 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (87397847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 43698918 + 43698919.

It is an arithmetic number, because the mean of its divisors is an integer number (43698919).

Almost surely, 2^87397837 is an apocalyptic number.

It is an amenable number.

87397837 is a deficient number, since it is larger than the sum of its proper divisors (1).

87397837 is an equidigital number, since it uses as much as digits as its factorization.

87397837 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1778112, while the sum is 52.

The square root of 87397837 is about 9348.6810299635. The cubic root of 87397837 is about 443.7791508457.

The spelling of 87397837 in words is "eighty-seven million, three hundred ninety-seven thousand, eight hundred thirty-seven".