1984913145 has 12 divisors (see below), whose sum is σ = 3440516196. Its totient is φ = 1058620320.

The previous prime is 1984913131. The next prime is 1984913173. The reversal of 1984913145 is 5413194891.

1984913145 is a `hidden beast` number, since 1 + 98 + 491 + 31 + 45 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 1510021881 + 474891264 = 38859^2 + 21792^2 .

It is not a de Polignac number, because 1984913145 - 2⁵ = 1984913113 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45), and also a Moran number because the ratio is a prime number: 44109181 = 1984913145 / (1 + 9 + 8 + 4 + 9 + 1 + 3 + 1 + 4 + 5).

It is a self number, because there is not a number n which added to its sum of digits gives 1984913145.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 22054546 + ... + 22054635.

It is an arithmetic number, because the mean of its divisors is an integer number (286709683).

Almost surely, 2^1984913145 is an apocalyptic number.

1984913145 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

1984913145 is a deficient number, since it is larger than the sum of its proper divisors (1455603051).

1984913145 is a wasteful number, since it uses less digits than its factorization.

1984913145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 44109192 (or 44109189 counting only the distinct ones).

The product of its digits is 155520, while the sum is 45.

The square root of 1984913145 is about 44552.3640786883. The cubic root of 1984913145 is about 1256.7450093479.

The spelling of 1984913145 in words is "one billion, nine hundred eighty-four million, nine hundred thirteen thousand, one hundred forty-five".