87389137 has 8 divisors (see below), whose sum is σ = 95404320. Its totient is φ = 79385760.

The previous prime is 87389111. The next prime is 87389171. The reversal of 87389137 is 73198378.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-87389137 is a prime.

It is a super-2 number, since 2×87389137² = 15273722531209538, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (87389177) 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, 21078 + ... + 24880.

It is an arithmetic number, because the mean of its divisors is an integer number (11925540).

Almost surely, 2^87389137 is an apocalyptic number.

It is an amenable number.

87389137 is a deficient number, since it is larger than the sum of its proper divisors (8015183).

87389137 is a wasteful number, since it uses less digits than its factorization.

87389137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5903.

The product of its digits is 254016, while the sum is 46.

The square root of 87389137 is about 9348.2157121025. The cubic root of 87389137 is about 443.7644250551.

The spelling of 87389137 in words is "eighty-seven million, three hundred eighty-nine thousand, one hundred thirty-seven".