1961167393 has 4 divisors (see below), whose sum is σ = 1961310208. Its totient is φ = 1961024580.

The previous prime is 1961167367. The next prime is 1961167469. The reversal of 1961167393 is 3937611691.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 3937611691 = 13 ⋅302893207.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1961167393 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1961167303) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 48321 + ... + 79102.

It is an arithmetic number, because the mean of its divisors is an integer number (490327552).

Almost surely, 2^1961167393 is an apocalyptic number.

It is an amenable number.

1961167393 is a deficient number, since it is larger than the sum of its proper divisors (142815).

1961167393 is a wasteful number, since it uses less digits than its factorization.

1961167393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142814.

The product of its digits is 183708, while the sum is 46.

The square root of 1961167393 is about 44285.0696397781. The cubic root of 1961167393 is about 1251.7133609491.

The spelling of 1961167393 in words is "one billion, nine hundred sixty-one million, one hundred sixty-seven thousand, three hundred ninety-three".