194963971 has 2 divisors, whose sum is σ = 194963972. Its totient is φ = 194963970.

The previous prime is 194963927. The next prime is 194963987. The reversal of 194963971 is 179369491.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 194963971 - 2⁷ = 194963843 is a prime.

It is not a weakly prime, because it can be changed into another prime (194963911) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 97481985 + 97481986.

It is an arithmetic number, because the mean of its divisors is an integer number (97481986).

Almost surely, 2^194963971 is an apocalyptic number.

194963971 is a deficient number, since it is larger than the sum of its proper divisors (1).

194963971 is an equidigital number, since it uses as much as digits as its factorization.

194963971 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 367416, while the sum is 49.

The square root of 194963971 is about 13962.9499390351. The cubic root of 194963971 is about 579.8532833416.

The spelling of 194963971 in words is "one hundred ninety-four million, nine hundred sixty-three thousand, nine hundred seventy-one".