90642629293 has 4 divisors (see below), whose sum is σ = 91734709248. Its totient is φ = 89550549340.

The previous prime is 90642629291. The next prime is 90642629327. The reversal of 90642629293 is 39292624609.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 90642629293 - 2¹ = 90642629291 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 90642629293.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (90642629291) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 546039853 + ... + 546040018.

It is an arithmetic number, because the mean of its divisors is an integer number (22933677312).

Almost surely, 2^90642629293 is an apocalyptic number.

It is an amenable number.

90642629293 is a deficient number, since it is larger than the sum of its proper divisors (1092079955).

90642629293 is a wasteful number, since it uses less digits than its factorization.

90642629293 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1092079954.

The product of its (nonzero) digits is 2519424, while the sum is 52.

The spelling of 90642629293 in words is "ninety billion, six hundred forty-two million, six hundred twenty-nine thousand, two hundred ninety-three".