427309947091 has 2 divisors, whose sum is σ = 427309947092. Its totient is φ = 427309947090.

The previous prime is 427309947067. The next prime is 427309947101. The reversal of 427309947091 is 190749903724.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 427309947091 - 2¹³ = 427309938899 is a prime.

It is not a weakly prime, because it can be changed into another prime (427309947191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 213654973545 + 213654973546.

It is an arithmetic number, because the mean of its divisors is an integer number (213654973546).

Almost surely, 2^427309947091 is an apocalyptic number.

427309947091 is a deficient number, since it is larger than the sum of its proper divisors (1).

427309947091 is an equidigital number, since it uses as much as digits as its factorization.

427309947091 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 3429216, while the sum is 55.

The spelling of 427309947091 in words is "four hundred twenty-seven billion, three hundred nine million, nine hundred forty-seven thousand, ninety-one".