1972140967 has 4 divisors (see below), whose sum is σ = 2075937880. Its totient is φ = 1868344056.

The previous prime is 1972140881. The next prime is 1972140977. The reversal of 1972140967 is 7690412791.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 7690412791 = 17 ⋅452377223.

It is a cyclic number.

It is not a de Polignac number, because 1972140967 - 2¹¹ = 1972138919 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 (1972140977) 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, 51898428 + ... + 51898465.

It is an arithmetic number, because the mean of its divisors is an integer number (518984470).

Almost surely, 2^1972140967 is an apocalyptic number.

1972140967 is a deficient number, since it is larger than the sum of its proper divisors (103796913).

1972140967 is a wasteful number, since it uses less digits than its factorization.

1972140967 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 103796912.

The product of its (nonzero) digits is 190512, while the sum is 46.

The square root of 1972140967 is about 44408.7938025792. The cubic root of 1972140967 is about 1254.0436446717.

The spelling of 1972140967 in words is "one billion, nine hundred seventy-two million, one hundred forty thousand, nine hundred sixty-seven".