90432340423 has 4 divisors (see below), whose sum is σ = 90516936760. Its totient is φ = 90347744088.

The previous prime is 90432340421. The next prime is 90432340513. The reversal of 90432340423 is 32404323409.

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 90432340423 - 2¹ = 90432340421 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 (90432340421) 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, 42296565 + ... + 42298702.

It is an arithmetic number, because the mean of its divisors is an integer number (22629234190).

Almost surely, 2^90432340423 is an apocalyptic number.

90432340423 is a deficient number, since it is larger than the sum of its proper divisors (84596337).

90432340423 is a wasteful number, since it uses less digits than its factorization.

90432340423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84596336.

The product of its (nonzero) digits is 62208, while the sum is 34.

The spelling of 90432340423 in words is "ninety billion, four hundred thirty-two million, three hundred forty thousand, four hundred twenty-three".