90384220429 has 4 divisors (see below), whose sum is σ = 90389929084. Its totient is φ = 90378511776.

The previous prime is 90384220417. The next prime is 90384220447. The reversal of 90384220429 is 92402248309.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 63555418404 + 26828802025 = 252102^2 + 163795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-90384220429 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 (90384220489) 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, 2830512 + ... + 2862265.

It is an arithmetic number, because the mean of its divisors is an integer number (22597482271).

Almost surely, 2^90384220429 is an apocalyptic number.

It is an amenable number.

90384220429 is a deficient number, since it is larger than the sum of its proper divisors (5708655).

90384220429 is a wasteful number, since it uses less digits than its factorization.

90384220429 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5708654.

The product of its (nonzero) digits is 248832, while the sum is 43.

The spelling of 90384220429 in words is "ninety billion, three hundred eighty-four million, two hundred twenty thousand, four hundred twenty-nine".