1913640963 has 16 divisors (see below), whose sum is σ = 2867262720. Its totient is φ = 1126423584.

The previous prime is 1913640961. The next prime is 1913640991. The reversal of 1913640963 is 3690463191.

It is not a de Polignac number, because 1913640963 - 2¹ = 1913640961 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1913640961) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1065793 + ... + 1067586.

It is an arithmetic number, because the mean of its divisors is an integer number (179203920).

Almost surely, 2^1913640963 is an apocalyptic number.

1913640963 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

1913640963 is a deficient number, since it is larger than the sum of its proper divisors (953621757).

1913640963 is a wasteful number, since it uses less digits than its factorization.

1913640963 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2133418.

The product of its (nonzero) digits is 104976, while the sum is 42.

The square root of 1913640963 is about 43745.1821690115. The cubic root of 1913640963 is about 1241.5193315043.

The spelling of 1913640963 in words is "one billion, nine hundred thirteen million, six hundred forty thousand, nine hundred sixty-three".