406277320391 has 2 divisors, whose sum is σ = 406277320392. Its totient is φ = 406277320390.

The previous prime is 406277320387. The next prime is 406277320433. The reversal of 406277320391 is 193023772604.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 406277320391 - 2² = 406277320387 is a prime.

It is a super-2 number, since 2×406277320391² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (406277329391) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 203138660195 + 203138660196.

It is an arithmetic number, because the mean of its divisors is an integer number (203138660196).

Almost surely, 2^406277320391 is an apocalyptic number.

406277320391 is a deficient number, since it is larger than the sum of its proper divisors (1).

406277320391 is an equidigital number, since it uses as much as digits as its factorization.

406277320391 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 381024, while the sum is 44.

The spelling of 406277320391 in words is "four hundred six billion, two hundred seventy-seven million, three hundred twenty thousand, three hundred ninety-one".