193820649 has 16 divisors (see below), whose sum is σ = 291016704. Its totient is φ = 113677200.

The previous prime is 193820623. The next prime is 193820677. The reversal of 193820649 is 946028391.

It is not a de Polignac number, because 193820649 - 2¹³ = 193812457 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 193820649.

It is not an unprimeable number, because it can be changed into a prime (193820449) 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, 93709 + ... + 95754.

It is an arithmetic number, because the mean of its divisors is an integer number (18188544).

Almost surely, 2^193820649 is an apocalyptic number.

It is an amenable number.

193820649 is a deficient number, since it is larger than the sum of its proper divisors (97196055).

193820649 is a wasteful number, since it uses less digits than its factorization.

193820649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189508.

The product of its (nonzero) digits is 93312, while the sum is 42.

The square root of 193820649 is about 13921.9484627691. The cubic root of 193820649 is about 578.7175877306.

The spelling of 193820649 in words is "one hundred ninety-three million, eight hundred twenty thousand, six hundred forty-nine".