197849749 has 8 divisors (see below), whose sum is σ = 207005760. Its totient is φ = 188739936.

The previous prime is 197849747. The next prime is 197849761. The reversal of 197849749 is 947948791.

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 197849749 - 2¹ = 197849747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 197849693 and 197849702.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197849747) 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, 2632 + ... + 20065.

It is an arithmetic number, because the mean of its divisors is an integer number (25875720).

Almost surely, 2^197849749 is an apocalyptic number.

It is an amenable number.

197849749 is a deficient number, since it is larger than the sum of its proper divisors (9156011).

197849749 is a wasteful number, since it uses less digits than its factorization.

197849749 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23099.

The product of its digits is 4572288, while the sum is 58.

The square root of 197849749 is about 14065.9073294260. The cubic root of 197849749 is about 582.7002009752.

The spelling of 197849749 in words is "one hundred ninety-seven million, eight hundred forty-nine thousand, seven hundred forty-nine".