149195863 has 2 divisors, whose sum is σ = 149195864. Its totient is φ = 149195862.

The previous prime is 149195861. The next prime is 149195869. The reversal of 149195863 is 368591941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 149195863 - 2¹ = 149195861 is a prime.

Together with 149195861, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149195861) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74597931 + 74597932.

It is an arithmetic number, because the mean of its divisors is an integer number (74597932).

Almost surely, 2^149195863 is an apocalyptic number.

149195863 is a deficient number, since it is larger than the sum of its proper divisors (1).

149195863 is an equidigital number, since it uses as much as digits as its factorization.

149195863 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 233280, while the sum is 46.

The square root of 149195863 is about 12214.5758420012. The cubic root of 149195863 is about 530.3781127623.

The spelling of 149195863 in words is "one hundred forty-nine million, one hundred ninety-five thousand, eight hundred sixty-three".