1422331991 has 2 divisors, whose sum is σ = 1422331992. Its totient is φ = 1422331990.

The previous prime is 1422331973. The next prime is 1422332033. The reversal of 1422331991 is 1991332241.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 1422331991 - 2³⁰ = 348590167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1422331901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 711165995 + 711165996.

It is an arithmetic number, because the mean of its divisors is an integer number (711165996).

Almost surely, 2^1422331991 is an apocalyptic number.

1422331991 is a deficient number, since it is larger than the sum of its proper divisors (1).

1422331991 is an equidigital number, since it uses as much as digits as its factorization.

1422331991 is an evil number, because the sum of its binary digits is even.

The product of its digits is 11664, while the sum is 35.

The square root of 1422331991 is about 37713.8169773360. The cubic root of 1422331991 is about 1124.6058183787.

The spelling of 1422331991 in words is "one billion, four hundred twenty-two million, three hundred thirty-one thousand, nine hundred ninety-one".