1961853197 has 8 divisors (see below), whose sum is σ = 2055366912. Its totient is φ = 1870228800.

The previous prime is 1961853181. The next prime is 1961853209. The reversal of 1961853197 is 7913581691.

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 1961853197 - 2⁴ = 1961853181 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1961853137) 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, 470204 + ... + 474357.

It is an arithmetic number, because the mean of its divisors is an integer number (256920864).

Almost surely, 2^1961853197 is an apocalyptic number.

It is an amenable number.

1961853197 is a deficient number, since it is larger than the sum of its proper divisors (93513715).

1961853197 is an equidigital number, since it uses as much as digits as its factorization.

1961853197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 944659.

The product of its digits is 408240, while the sum is 50.

The square root of 1961853197 is about 44292.8120240745. The cubic root of 1961853197 is about 1251.8592485448.

The spelling of 1961853197 in words is "one billion, nine hundred sixty-one million, eight hundred fifty-three thousand, one hundred ninety-seven".