90490210787 has 16 divisors (see below), whose sum is σ = 97671315840. Its totient is φ = 83577339648.

The previous prime is 90490210763. The next prime is 90490210823. The reversal of 90490210787 is 78701209409.

It is a cyclic number.

It is not a de Polignac number, because 90490210787 - 2¹² = 90490206691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (90490210717) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 242933 + ... + 489894.

It is an arithmetic number, because the mean of its divisors is an integer number (6104457240).

Almost surely, 2^90490210787 is an apocalyptic number.

90490210787 is a gapful number since it is divisible by the number (97) formed by its first and last digit.

90490210787 is a deficient number, since it is larger than the sum of its proper divisors (7181105053).

90490210787 is a wasteful number, since it uses less digits than its factorization.

90490210787 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 733010.

The product of its (nonzero) digits is 254016, while the sum is 47.

The spelling of 90490210787 in words is "ninety billion, four hundred ninety million, two hundred ten thousand, seven hundred eighty-seven".