194991027 has 16 divisors (see below), whose sum is σ = 324141312. Its totient is φ = 101293920.

The previous prime is 194991019. The next prime is 194991029. The reversal of 194991027 is 720199491.

It is not a de Polignac number, because 194991027 - 2³ = 194991019 is a prime.

It is a super-2 number, since 2×194991027² = 76043001221029458, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 194991027.

It is not an unprimeable number, because it can be changed into a prime (194991029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 421828 + ... + 422289.

It is an arithmetic number, because the mean of its divisors is an integer number (20258832).

Almost surely, 2^194991027 is an apocalyptic number.

194991027 is a deficient number, since it is larger than the sum of its proper divisors (129150285).

194991027 is a wasteful number, since it uses less digits than its factorization.

194991027 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 844138.

The product of its (nonzero) digits is 40824, while the sum is 42.

The square root of 194991027 is about 13963.9187551346. The cubic root of 194991027 is about 579.8801050233.

The spelling of 194991027 in words is "one hundred ninety-four million, nine hundred ninety-one thousand, twenty-seven".