90949207 has 2 divisors, whose sum is σ = 90949208. Its totient is φ = 90949206.

The previous prime is 90949163. The next prime is 90949247. The reversal of 90949207 is 70294909.

It is an a-pointer prime, because the next prime (90949247) can be obtained adding 90949207 to its sum of digits (40).

It is a strong prime.

It is an emirp because it is prime and its reverse (70294909) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90949207 - 2¹¹ = 90947159 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 90949207.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90949247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45474603 + 45474604.

It is an arithmetic number, because the mean of its divisors is an integer number (45474604).

Almost surely, 2^90949207 is an apocalyptic number.

90949207 is a deficient number, since it is larger than the sum of its proper divisors (1).

90949207 is an equidigital number, since it uses as much as digits as its factorization.

90949207 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 40824, while the sum is 40.

The square root of 90949207 is about 9536.7293659829. The cubic root of 90949207 is about 449.7104425276.

The spelling of 90949207 in words is "ninety million, nine hundred forty-nine thousand, two hundred seven".