90642433 has 8 divisors (see below), whose sum is σ = 103967552. Its totient is φ = 77411376.

The previous prime is 90642403. The next prime is 90642449. The reversal of 90642433 is 33424609.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 90642433 - 2⁹ = 90641921 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 90642395 and 90642404.

It is not an unprimeable number, because it can be changed into a prime (90642403) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21435 + ... + 25312.

It is an arithmetic number, because the mean of its divisors is an integer number (12995944).

Almost surely, 2^90642433 is an apocalyptic number.

It is an amenable number.

90642433 is a deficient number, since it is larger than the sum of its proper divisors (13325119).

90642433 is a wasteful number, since it uses less digits than its factorization.

90642433 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47031.

The product of its (nonzero) digits is 15552, while the sum is 31.

The square root of 90642433 is about 9520.6319643183. The cubic root of 90642433 is about 449.2042446882.

It can be divided in two parts, 906424 and 33, that multiplied together give a palindrome (29911992).

The spelling of 90642433 in words is "ninety million, six hundred forty-two thousand, four hundred thirty-three".