9930551291 has 2 divisors, whose sum is σ = 9930551292. Its totient is φ = 9930551290.

The previous prime is 9930551269. The next prime is 9930551297. The reversal of 9930551291 is 1921550399.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 9930551291 - 2²² = 9926356987 is a prime.

It is not a weakly prime, because it can be changed into another prime (9930551297) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4965275645 + 4965275646.

It is an arithmetic number, because the mean of its divisors is an integer number (4965275646).

Almost surely, 2^9930551291 is an apocalyptic number.

9930551291 is a deficient number, since it is larger than the sum of its proper divisors (1).

9930551291 is an equidigital number, since it uses as much as digits as its factorization.

9930551291 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 109350, while the sum is 44.

The square root of 9930551291 is about 99652.1514619730. The cubic root of 9930551291 is about 2149.4356760124.

The spelling of 9930551291 in words is "nine billion, nine hundred thirty million, five hundred fifty-one thousand, two hundred ninety-one".