1972849999 has 4 divisors (see below), whose sum is σ = 1982864664. Its totient is φ = 1962835336.

The previous prime is 1972849993. The next prime is 1972850021. The reversal of 1972849999 is 9999482791.

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

It is a cyclic number.

It is not a de Polignac number, because 1972849999 - 2¹¹ = 1972847951 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1972849993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5007037 + ... + 5007430.

It is an arithmetic number, because the mean of its divisors is an integer number (495716166).

Almost surely, 2^1972849999 is an apocalyptic number.

1972849999 is a deficient number, since it is larger than the sum of its proper divisors (10014665).

1972849999 is a wasteful number, since it uses less digits than its factorization.

1972849999 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10014664.

The product of its digits is 26453952, while the sum is 67.

The square root of 1972849999 is about 44416.7760986770. The cubic root of 1972849999 is about 1254.1939129253.

The spelling of 1972849999 in words is "one billion, nine hundred seventy-two million, eight hundred forty-nine thousand, nine hundred ninety-nine".