87994137 has 32 divisors (see below), whose sum is σ = 147216384. Its totient is φ = 45417600.

The previous prime is 87994133. The next prime is 87994157. The reversal of 87994137 is 73149978.

It is not a de Polignac number, because 87994137 - 2² = 87994133 is a prime.

It is not an unprimeable number, because it can be changed into a prime (87994133) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 37437 + ... + 39717.

It is an arithmetic number, because the mean of its divisors is an integer number (4600512).

Almost surely, 2^87994137 is an apocalyptic number.

It is an amenable number.

87994137 is a deficient number, since it is larger than the sum of its proper divisors (59222247).

87994137 is a wasteful number, since it uses less digits than its factorization.

87994137 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2469.

The product of its digits is 381024, while the sum is 48.

The square root of 87994137 is about 9380.5190154916. The cubic root of 87994137 is about 444.7861397162.

It can be divided in two parts, 879941 and 37, that added together give a palindrome (879978).

The spelling of 87994137 in words is "eighty-seven million, nine hundred ninety-four thousand, one hundred thirty-seven".