90901439999 has 2 divisors, whose sum is σ = 90901440000. Its totient is φ = 90901439998.

The previous prime is 90901439971. The next prime is 90901440031. The reversal of 90901439999 is 99993410909.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90901439999 - 2¹² = 90901435903 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90901439929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45450719999 + 45450720000.

It is an arithmetic number, because the mean of its divisors is an integer number (45450720000).

Almost surely, 2^90901439999 is an apocalyptic number.

90901439999 is a deficient number, since it is larger than the sum of its proper divisors (1).

90901439999 is an equidigital number, since it uses as much as digits as its factorization.

90901439999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6377292, while the sum is 62.

The spelling of 90901439999 in words is "ninety billion, nine hundred one million, four hundred thirty-nine thousand, nine hundred ninety-nine".