87863434 has 4 divisors (see below), whose sum is σ = 131795154. Its totient is φ = 43931716.

The previous prime is 87863411. The next prime is 87863437. The reversal of 87863434 is 43436878.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43436878 = 2 ⋅21718439.

It can be written as a sum of positive squares in only one way, i.e., 87366409 + 497025 = 9347^2 + 705^2 .

It is not an unprimeable number, because it can be changed into a prime (87863437) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21965857 + ... + 21965860.

Almost surely, 2^87863434 is an apocalyptic number.

87863434 is a deficient number, since it is larger than the sum of its proper divisors (43931720).

87863434 is a wasteful number, since it uses less digits than its factorization.

87863434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43931719.

The product of its digits is 387072, while the sum is 43.

The square root of 87863434 is about 9373.5497011538. The cubic root of 87863434 is about 444.5658080278.

The spelling of 87863434 in words is "eighty-seven million, eight hundred sixty-three thousand, four hundred thirty-four".