90102007 has 2 divisors, whose sum is σ = 90102008. Its totient is φ = 90102006.

The previous prime is 90101953. The next prime is 90102029. The reversal of 90102007 is 70020109.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90102007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90102037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45051003 + 45051004.

It is an arithmetic number, because the mean of its divisors is an integer number (45051004).

Almost surely, 2^90102007 is an apocalyptic number.

90102007 is a deficient number, since it is larger than the sum of its proper divisors (1).

90102007 is an equidigital number, since it uses as much as digits as its factorization.

90102007 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 126, while the sum is 19.

The square root of 90102007 is about 9492.2076989497. The cubic root of 90102007 is about 448.3097198615.

The spelling of 90102007 in words is "ninety million, one hundred two thousand, seven".