189801705 has 16 divisors (see below), whose sum is σ = 306633600. Its totient is φ = 100243968.

The previous prime is 189801701. The next prime is 189801707. The reversal of 189801705 is 507108981.

It is not a de Polignac number, because 189801705 - 2² = 189801701 is a prime.

It is not an unprimeable number, because it can be changed into a prime (189801701) 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, 59880 + ... + 62969.

It is an arithmetic number, because the mean of its divisors is an integer number (19164600).

Almost surely, 2^189801705 is an apocalyptic number.

189801705 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

189801705 is a deficient number, since it is larger than the sum of its proper divisors (116831895).

189801705 is a wasteful number, since it uses less digits than its factorization.

189801705 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 122960.

The product of its (nonzero) digits is 20160, while the sum is 39.

The square root of 189801705 is about 13776.8539587237. The cubic root of 189801705 is about 574.6896422175.

The spelling of 189801705 in words is "one hundred eighty-nine million, eight hundred one thousand, seven hundred five".