90187275293947 has 16 divisors (see below), whose sum is σ = 97503862290912. Its totient is φ = 82924853944320.

The previous prime is 90187275293909. The next prime is 90187275293953. The reversal of 90187275293947 is 74939257278109.

It is a cyclic number.

It is not a de Polignac number, because 90187275293947 - 2¹⁹ = 90187274769659 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 90187275293947.

It is not an unprimeable number, because it can be changed into a prime (90187275293147) 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, 544490172 + ... + 544655782.

It is an arithmetic number, because the mean of its divisors is an integer number (6093991393182).

Almost surely, 2^{90187275293947} is an apocalyptic number.

90187275293947 is a deficient number, since it is larger than the sum of its proper divisors (7316586996965).

90187275293947 is a wasteful number, since it uses less digits than its factorization.

90187275293947 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 328878.

The product of its (nonzero) digits is 480090240, while the sum is 73.

The spelling of 90187275293947 in words is "ninety trillion, one hundred eighty-seven billion, two hundred seventy-five million, two hundred ninety-three thousand, nine hundred forty-seven".