90206667 has 18 divisors (see below), whose sum is σ = 136217172. Its totient is φ = 57520056.

The previous prime is 90206663. The next prime is 90206741. The reversal of 90206667 is 76660209.

It is not a de Polignac number, because 90206667 - 2² = 90206663 is a prime.

It is not an unprimeable number, because it can be changed into a prime (90206663) 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 17 ways as a sum of consecutive naturals, for example, 4713 + ... + 14234.

Almost surely, 2^90206667 is an apocalyptic number.

90206667 is a deficient number, since it is larger than the sum of its proper divisors (46010505).

90206667 is a wasteful number, since it uses less digits than its factorization.

90206667 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18999 (or 18973 counting only the distinct ones).

The product of its (nonzero) digits is 27216, while the sum is 36.

The square root of 90206667 is about 9497.7190419595. The cubic root of 90206667 is about 448.4832340873.

The spelling of 90206667 in words is "ninety million, two hundred six thousand, six hundred sixty-seven".