381197923 has 2 divisors, whose sum is σ = 381197924. Its totient is φ = 381197922.

The previous prime is 381197899. The next prime is 381197941. The reversal of 381197923 is 329791183.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-381197923 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 381197923.

It is not a weakly prime, because it can be changed into another prime (381197983) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 190598961 + 190598962.

It is an arithmetic number, because the mean of its divisors is an integer number (190598962).

Almost surely, 2^381197923 is an apocalyptic number.

381197923 is a deficient number, since it is larger than the sum of its proper divisors (1).

381197923 is an equidigital number, since it uses as much as digits as its factorization.

381197923 is an evil number, because the sum of its binary digits is even.

The product of its digits is 81648, while the sum is 43.

The square root of 381197923 is about 19524.2905889049. The cubic root of 381197923 is about 725.0759638200.

The spelling of 381197923 in words is "three hundred eighty-one million, one hundred ninety-seven thousand, nine hundred twenty-three".