90154423 has 4 divisors (see below), whose sum is σ = 90260968. Its totient is φ = 90047880.

The previous prime is 90154409. The next prime is 90154429. The reversal of 90154423 is 32445109.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 32445109 = 647 ⋅50147.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90154423 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90154391 and 90154400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90154429) 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, 51993 + ... + 53698.

It is an arithmetic number, because the mean of its divisors is an integer number (22565242).

Almost surely, 2^90154423 is an apocalyptic number.

90154423 is a deficient number, since it is larger than the sum of its proper divisors (106545).

90154423 is a wasteful number, since it uses less digits than its factorization.

90154423 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 106544.

The product of its (nonzero) digits is 4320, while the sum is 28.

The square root of 90154423 is about 9494.9682990519. The cubic root of 90154423 is about 448.3966363384.

The spelling of 90154423 in words is "ninety million, one hundred fifty-four thousand, four hundred twenty-three".