196561953 has 24 divisors (see below), whose sum is σ = 325297856. Its totient is φ = 112039200.

The previous prime is 196561951. The next prime is 196561957. The reversal of 196561953 is 359165691.

196561953 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 196561953 - 2¹ = 196561951 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 196561899 and 196561908.

It is not an unprimeable number, because it can be changed into a prime (196561951) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22818 + ... + 30228.

Almost surely, 2^196561953 is an apocalyptic number.

It is an amenable number.

196561953 is a deficient number, since it is larger than the sum of its proper divisors (128735903).

196561953 is a wasteful number, since it uses less digits than its factorization.

196561953 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7845 (or 7842 counting only the distinct ones).

The product of its digits is 218700, while the sum is 45.

The square root of 196561953 is about 14020.0553850547. The cubic root of 196561953 is about 581.4331906801.

It can be divided in two parts, 19656 and 1953, that added together give a square (21609 = 147²).

The spelling of 196561953 in words is "one hundred ninety-six million, five hundred sixty-one thousand, nine hundred fifty-three".