90243972287 has 8 divisors (see below), whose sum is σ = 107620141056. Its totient is φ = 73988846712.

The previous prime is 90243972263. The next prime is 90243972289. The reversal of 90243972287 is 78227934209.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 90243972287 - 2¹⁸ = 90243710143 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90243972289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 280260623 + ... + 280260944.

It is an arithmetic number, because the mean of its divisors is an integer number (13452517632).

Almost surely, 2^90243972287 is an apocalyptic number.

90243972287 is a deficient number, since it is larger than the sum of its proper divisors (17376168769).

90243972287 is a wasteful number, since it uses less digits than its factorization.

90243972287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 560521597.

The product of its (nonzero) digits is 3048192, while the sum is 53.

The spelling of 90243972287 in words is "ninety billion, two hundred forty-three million, nine hundred seventy-two thousand, two hundred eighty-seven".