90428273 has 4 divisors (see below), whose sum is σ = 97384308. Its totient is φ = 83472240.

The previous prime is 90428243. The next prime is 90428309. The reversal of 90428273 is 37282409.

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

It can be written as a sum of positive squares in 2 ways, for example, as 9284209 + 81144064 = 3047^2 + 9008^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90428273 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (90428213) 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, 3477998 + ... + 3478023.

It is an arithmetic number, because the mean of its divisors is an integer number (24346077).

Almost surely, 2^90428273 is an apocalyptic number.

It is an amenable number.

90428273 is a deficient number, since it is larger than the sum of its proper divisors (6956035).

90428273 is a wasteful number, since it uses less digits than its factorization.

90428273 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6956034.

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

The square root of 90428273 is about 9509.3781605318. The cubic root of 90428273 is about 448.8501888584.

The spelling of 90428273 in words is "ninety million, four hundred twenty-eight thousand, two hundred seventy-three".