921920271967 has 2 divisors, whose sum is σ = 921920271968. Its totient is φ = 921920271966.

The previous prime is 921920271919. The next prime is 921920272043. The reversal of 921920271967 is 769172029129.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 921920271967 - 2²³ = 921911883359 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (921920278967) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460960135983 + 460960135984.

It is an arithmetic number, because the mean of its divisors is an integer number (460960135984).

Almost surely, 2^921920271967 is an apocalyptic number.

921920271967 is a deficient number, since it is larger than the sum of its proper divisors (1).

921920271967 is an equidigital number, since it uses as much as digits as its factorization.

921920271967 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1714608, while the sum is 55.

The spelling of 921920271967 in words is "nine hundred twenty-one billion, nine hundred twenty million, two hundred seventy-one thousand, nine hundred sixty-seven".