9090909031 has 2 divisors, whose sum is σ = 9090909032. Its totient is φ = 9090909030.

The previous prime is 9090909029. The next prime is 9090909127. The reversal of 9090909031 is 1309090909.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 9090909031 - 2¹ = 9090909029 is a prime.

It is a super-2 number, since 2×9090909031² (a number of 21 digits) contains 22 as substring.

Together with 9090909029, 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 (9090909431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4545454515 + 4545454516.

It is an arithmetic number, because the mean of its divisors is an integer number (4545454516).

Almost surely, 2^9090909031 is an apocalyptic number.

9090909031 is a deficient number, since it is larger than the sum of its proper divisors (1).

9090909031 is an equidigital number, since it uses as much as digits as its factorization.

9090909031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19683, while the sum is 40.

The square root of 9090909031 is about 95346.2586103933. The cubic root of 9090909031 is about 2087.0640178386.

The spelling of 9090909031 in words is "nine billion, ninety million, nine hundred nine thousand, thirty-one".