189390809401 has 4 divisors (see below), whose sum is σ = 190524886272. Its totient is φ = 188256732532.

The previous prime is 189390809393. The next prime is 189390809407. The reversal of 189390809401 is 104908093981.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 189390809401 - 2³ = 189390809393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (189390809407) 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, 567038185 + ... + 567038518.

It is an arithmetic number, because the mean of its divisors is an integer number (47631221568).

Almost surely, 2^189390809401 is an apocalyptic number.

It is an amenable number.

189390809401 is a deficient number, since it is larger than the sum of its proper divisors (1134076871).

189390809401 is a wasteful number, since it uses less digits than its factorization.

189390809401 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1134076870.

The product of its (nonzero) digits is 559872, while the sum is 52.

The spelling of 189390809401 in words is "one hundred eighty-nine billion, three hundred ninety million, eight hundred nine thousand, four hundred one".