90804542 has 4 divisors (see below), whose sum is σ = 136206816. Its totient is φ = 45402270.

The previous prime is 90804503. The next prime is 90804547. The reversal of 90804542 is 24540809.

It is a semiprime because it is the product of two primes.

It is a junction number, because it is equal to n+sod(n) for n = 90804499 and 90804508.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90804547) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22701134 + ... + 22701137.

It is an arithmetic number, because the mean of its divisors is an integer number (34051704).

Almost surely, 2^90804542 is an apocalyptic number.

90804542 is a deficient number, since it is larger than the sum of its proper divisors (45402274).

90804542 is a wasteful number, since it uses less digits than its factorization.

90804542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 45402273.

The product of its (nonzero) digits is 11520, while the sum is 32.

The square root of 90804542 is about 9529.1417242058. The cubic root of 90804542 is about 449.4718775544.

The spelling of 90804542 in words is "ninety million, eight hundred four thousand, five hundred forty-two".