90434087 has 4 divisors (see below), whose sum is σ = 91329576. Its totient is φ = 89538600.

The previous prime is 90434039. The next prime is 90434119. The reversal of 90434087 is 78043409.

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 90434087 - 2⁸ = 90433831 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 (90434387) 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, 447593 + ... + 447794.

It is an arithmetic number, because the mean of its divisors is an integer number (22832394).

Almost surely, 2^90434087 is an apocalyptic number.

90434087 is a deficient number, since it is larger than the sum of its proper divisors (895489).

90434087 is a wasteful number, since it uses less digits than its factorization.

90434087 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 895488.

The product of its (nonzero) digits is 24192, while the sum is 35.

The square root of 90434087 is about 9509.6838538408. The cubic root of 90434087 is about 448.8598081179.

The spelling of 90434087 in words is "ninety million, four hundred thirty-four thousand, eighty-seven".