1916772013 has 16 divisors (see below), whose sum is σ = 2123573760. Its totient is φ = 1718611776.

The previous prime is 1916772007. The next prime is 1916772031. The reversal of 1916772013 is 3102776191.

It is the 17874-th star number.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1916772013 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1916772713) 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, 313956 + ... + 320002.

It is an arithmetic number, because the mean of its divisors is an integer number (132723360).

Almost surely, 2^1916772013 is an apocalyptic number.

1916772013 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1916772013 is a deficient number, since it is larger than the sum of its proper divisors (206801747).

1916772013 is a wasteful number, since it uses less digits than its factorization.

1916772013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6756.

The product of its (nonzero) digits is 15876, while the sum is 37.

The square root of 1916772013 is about 43780.9549119249. The cubic root of 1916772013 is about 1242.1960765199.

The spelling of 1916772013 in words is "one billion, nine hundred sixteen million, seven hundred seventy-two thousand, thirteen".