1961373299 has 4 divisors (see below), whose sum is σ = 1961547336. Its totient is φ = 1961199264.

The previous prime is 1961373251. The next prime is 1961373301. The reversal of 1961373299 is 9923731691.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1961373299 - 2²⁴ = 1944596083 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1961373229) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68849 + ... + 93074.

It is an arithmetic number, because the mean of its divisors is an integer number (490386834).

Almost surely, 2^1961373299 is an apocalyptic number.

1961373299 is a deficient number, since it is larger than the sum of its proper divisors (174037).

1961373299 is a wasteful number, since it uses less digits than its factorization.

1961373299 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174036.

The product of its digits is 551124, while the sum is 50.

The square root of 1961373299 is about 44287.3943577628. The cubic root of 1961373299 is about 1251.7571658571.

The spelling of 1961373299 in words is "one billion, nine hundred sixty-one million, three hundred seventy-three thousand, two hundred ninety-nine".