194097980587 has 4 divisors (see below), whose sum is σ = 221826263536. Its totient is φ = 166369697640.

The previous prime is 194097980581. The next prime is 194097980599. The reversal of 194097980587 is 785089790491.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 194097980587 - 2¹⁵ = 194097947819 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (194097980581) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13864141464 + ... + 13864141477.

It is an arithmetic number, because the mean of its divisors is an integer number (55456565884).

Almost surely, 2^194097980587 is an apocalyptic number.

194097980587 is a deficient number, since it is larger than the sum of its proper divisors (27728282949).

194097980587 is an equidigital number, since it uses as much as digits as its factorization.

194097980587 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27728282948.

The product of its (nonzero) digits is 45722880, while the sum is 67.

The spelling of 194097980587 in words is "one hundred ninety-four billion, ninety-seven million, nine hundred eighty thousand, five hundred eighty-seven".