87234019 has 4 divisors (see below), whose sum is σ = 89361720. Its totient is φ = 85106320.

The previous prime is 87234013. The next prime is 87234053. The reversal of 87234019 is 91043278.

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

It is a cyclic number.

It is not a de Polignac number, because 87234019 - 2⁷ = 87233891 is a prime.

It is a super-2 number, since 2×87234019² = 15219548141784722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (87234013) 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, 1063789 + ... + 1063870.

It is an arithmetic number, because the mean of its divisors is an integer number (22340430).

Almost surely, 2^87234019 is an apocalyptic number.

87234019 is a deficient number, since it is larger than the sum of its proper divisors (2127701).

87234019 is a wasteful number, since it uses less digits than its factorization.

87234019 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2127700.

The product of its (nonzero) digits is 12096, while the sum is 34.

The square root of 87234019 is about 9339.9153636422. The cubic root of 87234019 is about 443.5017050683.

The spelling of 87234019 in words is "eighty-seven million, two hundred thirty-four thousand, nineteen".