90000427031 has 2 divisors, whose sum is σ = 90000427032. Its totient is φ = 90000427030.

The previous prime is 90000427021. The next prime is 90000427043. The reversal of 90000427031 is 13072400009.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90000427031 - 2¹⁸ = 90000164887 is a prime.

It is a super-2 number, since 2×90000427031² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (90000427021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45000213515 + 45000213516.

It is an arithmetic number, because the mean of its divisors is an integer number (45000213516).

Almost surely, 2^90000427031 is an apocalyptic number.

90000427031 is a deficient number, since it is larger than the sum of its proper divisors (1).

90000427031 is an equidigital number, since it uses as much as digits as its factorization.

90000427031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1512, while the sum is 26.

The spelling of 90000427031 in words is "ninety billion, four hundred twenty-seven thousand, thirty-one".