90141552421 has 2 divisors, whose sum is σ = 90141552422. Its totient is φ = 90141552420.

The previous prime is 90141552419. The next prime is 90141552547. The reversal of 90141552421 is 12425514109.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 83572449921 + 6569102500 = 289089^2 + 81050^2 .

It is an emirp because it is prime and its reverse (12425514109) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 90141552421 - 2¹ = 90141552419 is a prime.

It is a super-2 number, since 2×90141552421² (a number of 23 digits) contains 22 as substring.

Together with 90141552419, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90141553421) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45070776210 + 45070776211.

It is an arithmetic number, because the mean of its divisors is an integer number (45070776211).

Almost surely, 2^90141552421 is an apocalyptic number.

It is an amenable number.

90141552421 is a deficient number, since it is larger than the sum of its proper divisors (1).

90141552421 is an equidigital number, since it uses as much as digits as its factorization.

90141552421 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14400, while the sum is 34.

The spelling of 90141552421 in words is "ninety billion, one hundred forty-one million, five hundred fifty-two thousand, four hundred twenty-one".