194073981 has 8 divisors (see below), whose sum is σ = 267112704. Its totient is φ = 125208960.

The previous prime is 194073973. The next prime is 194073983. The reversal of 194073981 is 189370491.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 194073981 - 2³ = 194073973 is a prime.

It is a super-2 number, since 2×194073981² = 75329420202376722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (194073983) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1043316 + ... + 1043501.

It is an arithmetic number, because the mean of its divisors is an integer number (33389088).

Almost surely, 2^194073981 is an apocalyptic number.

It is an amenable number.

194073981 is a deficient number, since it is larger than the sum of its proper divisors (73038723).

194073981 is a wasteful number, since it uses less digits than its factorization.

194073981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2086851.

The product of its (nonzero) digits is 54432, while the sum is 42.

The square root of 194073981 is about 13931.0437871683. The cubic root of 194073981 is about 578.9696142937.

The spelling of 194073981 in words is "one hundred ninety-four million, seventy-three thousand, nine hundred eighty-one".