90949473031 has 2 divisors, whose sum is σ = 90949473032. Its totient is φ = 90949473030.

The previous prime is 90949473019. The next prime is 90949473103. The reversal of 90949473031 is 13037494909.

Together with next prime (90949473103) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 90949473031 - 2⁹ = 90949472519 is a prime.

It is a super-2 number, since 2×90949473031² (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 (90949473631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 45474736515 + 45474736516.

It is an arithmetic number, because the mean of its divisors is an integer number (45474736516).

Almost surely, 2^90949473031 is an apocalyptic number.

90949473031 is a deficient number, since it is larger than the sum of its proper divisors (1).

90949473031 is an equidigital number, since it uses as much as digits as its factorization.

90949473031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 734832, while the sum is 49.

The spelling of 90949473031 in words is "ninety billion, nine hundred forty-nine million, four hundred seventy-three thousand, thirty-one".