189691406 has 16 divisors (see below), whose sum is σ = 303581520. Its totient is φ = 88583040.

The previous prime is 189691393. The next prime is 189691409. The reversal of 189691406 is 604196981.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (189691409) 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, 16841 + ... + 25748.

It is an arithmetic number, because the mean of its divisors is an integer number (18973845).

Almost surely, 2^189691406 is an apocalyptic number.

189691406 is a deficient number, since it is larger than the sum of its proper divisors (113890114).

189691406 is a wasteful number, since it uses less digits than its factorization.

189691406 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 42739.

The product of its (nonzero) digits is 93312, while the sum is 44.

The square root of 189691406 is about 13772.8503222826. The cubic root of 189691406 is about 574.5782979849.

The spelling of 189691406 in words is "one hundred eighty-nine million, six hundred ninety-one thousand, four hundred six".