199634545 has 8 divisors (see below), whose sum is σ = 261339840. Its totient is φ = 145188720.

The previous prime is 199634489. The next prime is 199634551. The reversal of 199634545 is 545436991.

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

It is not a de Polignac number, because 199634545 - 2¹³ = 199626353 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 199634495 and 199634504.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1814805 + ... + 1814914.

It is an arithmetic number, because the mean of its divisors is an integer number (32667480).

Almost surely, 2^199634545 is an apocalyptic number.

It is an amenable number.

199634545 is a deficient number, since it is larger than the sum of its proper divisors (61705295).

199634545 is a wasteful number, since it uses less digits than its factorization.

199634545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3629735.

The product of its digits is 583200, while the sum is 46.

The square root of 199634545 is about 14129.2089304391. The cubic root of 199634545 is about 584.4471314967.

The spelling of 199634545 in words is "one hundred ninety-nine million, six hundred thirty-four thousand, five hundred forty-five".