9427998031 has 2 divisors, whose sum is σ = 9427998032. Its totient is φ = 9427998030.

The previous prime is 9427998007. The next prime is 9427998053. The reversal of 9427998031 is 1308997249.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-9427998031 is a prime.

It is a super-2 number, since 2×9427998031² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 9427998031.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (9427998071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4713999015 + 4713999016.

It is an arithmetic number, because the mean of its divisors is an integer number (4713999016).

Almost surely, 2^9427998031 is an apocalyptic number.

9427998031 is a deficient number, since it is larger than the sum of its proper divisors (1).

9427998031 is an equidigital number, since it uses as much as digits as its factorization.

9427998031 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 979776, while the sum is 52.

The square root of 9427998031 is about 97097.8786122539. The cubic root of 9427998031 is about 2112.5475567693.

The spelling of 9427998031 in words is "nine billion, four hundred twenty-seven million, nine hundred ninety-eight thousand, thirty-one".