87169406 has 4 divisors (see below), whose sum is σ = 130754112. Its totient is φ = 43584702.

The previous prime is 87169393. The next prime is 87169429. The reversal of 87169406 is 60496178.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60496178 = 2 ⋅30248089.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21792350 + ... + 21792353.

It is an arithmetic number, because the mean of its divisors is an integer number (32688528).

Almost surely, 2^87169406 is an apocalyptic number.

87169406 is a deficient number, since it is larger than the sum of its proper divisors (43584706).

87169406 is a wasteful number, since it uses less digits than its factorization.

87169406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43584705.

The product of its (nonzero) digits is 72576, while the sum is 41.

The square root of 87169406 is about 9336.4557515151. The cubic root of 87169406 is about 443.3921795493.

The spelling of 87169406 in words is "eighty-seven million, one hundred sixty-nine thousand, four hundred six".