90278373 has 4 divisors (see below), whose sum is σ = 120371168. Its totient is φ = 60185580.

The previous prime is 90278369. The next prime is 90278389. The reversal of 90278373 is 37387209.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 90278373 - 2² = 90278369 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 (90278303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15046393 + ... + 15046398.

It is an arithmetic number, because the mean of its divisors is an integer number (30092792).

Almost surely, 2^90278373 is an apocalyptic number.

It is an amenable number.

90278373 is a deficient number, since it is larger than the sum of its proper divisors (30092795).

90278373 is a wasteful number, since it uses less digits than its factorization.

90278373 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30092794.

The product of its (nonzero) digits is 63504, while the sum is 39.

The square root of 90278373 is about 9501.4931984399. The cubic root of 90278373 is about 448.6020369152.

The spelling of 90278373 in words is "ninety million, two hundred seventy-eight thousand, three hundred seventy-three".