1961907763 has 4 divisors (see below), whose sum is σ = 2077314120. Its totient is φ = 1846501408.

The previous prime is 1961907749. The next prime is 1961907799. The reversal of 1961907763 is 3677091691.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1961907763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1961907733) 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, 57703153 + ... + 57703186.

It is an arithmetic number, because the mean of its divisors is an integer number (519328530).

Almost surely, 2^1961907763 is an apocalyptic number.

1961907763 is a deficient number, since it is larger than the sum of its proper divisors (115406357).

1961907763 is a wasteful number, since it uses less digits than its factorization.

1961907763 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115406356.

The product of its (nonzero) digits is 428652, while the sum is 49.

The square root of 1961907763 is about 44293.4279888112. The cubic root of 1961907763 is about 1251.8708546321.

The spelling of 1961907763 in words is "one billion, nine hundred sixty-one million, nine hundred seven thousand, seven hundred sixty-three".