189612901 has 8 divisors (see below), whose sum is σ = 197408024. Its totient is φ = 181958400.

The previous prime is 189612893. The next prime is 189612911. The reversal of 189612901 is 109216981.

189612901 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Cunningham number, because it is equal to 13770²+1.

It can be written as a sum of positive squares in 4 ways, for example, as 107619876 + 81993025 = 10374^2 + 9055^2 .

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

It is a cyclic number.

It is not a de Polignac number, because 189612901 - 2³ = 189612893 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is an alternating number because its digits alternate between odd and even.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189612911) 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, 32400 + ... + 37801.

It is an arithmetic number, because the mean of its divisors is an integer number (24676003).

Almost surely, 2^189612901 is an apocalyptic number.

It is an amenable number.

189612901 is a deficient number, since it is larger than the sum of its proper divisors (7795123).

189612901 is an equidigital number, since it uses as much as digits as its factorization.

189612901 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 70311.

The product of its (nonzero) digits is 7776, while the sum is 37.

The square root of 189612901 is about 13770.0000363108. Note that the first 4 decimals coincide. The cubic root of 189612901 is about 574.4990227482.

The spelling of 189612901 in words is "one hundred eighty-nine million, six hundred twelve thousand, nine hundred one".