87149223 has 32 divisors (see below), whose sum is σ = 148262400. Its totient is φ = 49560768.

The previous prime is 87149221. The next prime is 87149243. The reversal of 87149223 is 32294178.

It is not a de Polignac number, because 87149223 - 2¹ = 87149221 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87149221) 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, 43048 + ... + 45026.

It is an arithmetic number, because the mean of its divisors is an integer number (4633200).

Almost surely, 2^87149223 is an apocalyptic number.

87149223 is a deficient number, since it is larger than the sum of its proper divisors (61113177).

87149223 is a wasteful number, since it uses less digits than its factorization.

87149223 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2228 (or 2222 counting only the distinct ones).

The product of its digits is 24192, while the sum is 36.

The square root of 87149223 is about 9335.3748183991. The cubic root of 87149223 is about 443.3579562457.

The spelling of 87149223 in words is "eighty-seven million, one hundred forty-nine thousand, two hundred twenty-three".