196878949 has 4 divisors (see below), whose sum is σ = 197966860. Its totient is φ = 195791040.

The previous prime is 196878937. The next prime is 196878959. The reversal of 196878949 is 949878691.

196878949 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 949878691 = 743 ⋅1278437.

It can be written as a sum of positive squares in 2 ways, for example, as 18122049 + 178756900 = 4257^2 + 13370^2 .

It is a cyclic number.

It is not a de Polignac number, because 196878949 - 2⁵ = 196878917 is a prime.

It is a super-2 number, since 2×196878949² = 77522641118689202, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (196878959) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 543684 + ... + 544045.

It is an arithmetic number, because the mean of its divisors is an integer number (49491715).

Almost surely, 2^196878949 is an apocalyptic number.

It is an amenable number.

196878949 is a deficient number, since it is larger than the sum of its proper divisors (1087911).

196878949 is a wasteful number, since it uses less digits than its factorization.

196878949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1087910.

The product of its digits is 7838208, while the sum is 61.

The square root of 196878949 is about 14031.3559216492. The cubic root of 196878949 is about 581.7455824416.

The spelling of 196878949 in words is "one hundred ninety-six million, eight hundred seventy-eight thousand, nine hundred forty-nine".