90729907 has 2 divisors, whose sum is σ = 90729908. Its totient is φ = 90729906.

The previous prime is 90729889. The next prime is 90729913. The reversal of 90729907 is 70992709.

It is a strong prime.

It is an emirp because it is prime and its reverse (70992709) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90729907 is a prime.

It is not a weakly prime, because it can be changed into another prime (90729937) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45364953 + 45364954.

It is an arithmetic number, because the mean of its divisors is an integer number (45364954).

Almost surely, 2^90729907 is an apocalyptic number.

90729907 is a deficient number, since it is larger than the sum of its proper divisors (1).

90729907 is an equidigital number, since it uses as much as digits as its factorization.

90729907 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 71442, while the sum is 43.

The square root of 90729907 is about 9525.2247742507. The cubic root of 90729907 is about 449.3486989558.

The spelling of 90729907 in words is "ninety million, seven hundred twenty-nine thousand, nine hundred seven".