90781273 has 8 divisors (see below), whose sum is σ = 99506016. Its totient is φ = 82135200.

The previous prime is 90781247. The next prime is 90781277. The reversal of 90781273 is 37218709.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90781273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90781277) 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, 17236 + ... + 21877.

It is an arithmetic number, because the mean of its divisors is an integer number (12438252).

Almost surely, 2^90781273 is an apocalyptic number.

It is an amenable number.

90781273 is a deficient number, since it is larger than the sum of its proper divisors (8724743).

90781273 is a wasteful number, since it uses less digits than its factorization.

90781273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39335.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 90781273 is about 9527.9207070588. The cubic root of 90781273 is about 449.4334813304.

The spelling of 90781273 in words is "ninety million, seven hundred eighty-one thousand, two hundred seventy-three".