87434197 has 4 divisors (see below), whose sum is σ = 88063360. Its totient is φ = 86805036.

The previous prime is 87434189. The next prime is 87434203. The reversal of 87434197 is 79143478.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 87434197 - 2³ = 87434189 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (87434177) 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, 314373 + ... + 314650.

It is an arithmetic number, because the mean of its divisors is an integer number (22015840).

Almost surely, 2^87434197 is an apocalyptic number.

It is an amenable number.

87434197 is a deficient number, since it is larger than the sum of its proper divisors (629163).

87434197 is a wasteful number, since it uses less digits than its factorization.

87434197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 629162.

The product of its digits is 169344, while the sum is 43.

The square root of 87434197 is about 9350.6254870998. The cubic root of 87434197 is about 443.8406839200.

The spelling of 87434197 in words is "eighty-seven million, four hundred thirty-four thousand, one hundred ninety-seven".