1972303987 has 16 divisors (see below), whose sum is σ = 2090560000. Its totient is φ = 1855548000.

The previous prime is 1972303969. The next prime is 1972304003. The reversal of 1972303987 is 7893032791.

It is a cyclic number.

It is not a de Polignac number, because 1972303987 - 2⁷ = 1972303859 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1972303987.

It is not an unprimeable number, because it can be changed into a prime (1972303937) 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 15 ways as a sum of consecutive naturals, for example, 2625862 + ... + 2626612.

It is an arithmetic number, because the mean of its divisors is an integer number (130660000).

Almost surely, 2^1972303987 is an apocalyptic number.

1972303987 is a deficient number, since it is larger than the sum of its proper divisors (118256013).

1972303987 is a wasteful number, since it uses less digits than its factorization.

1972303987 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546.

The product of its (nonzero) digits is 571536, while the sum is 49.

The square root of 1972303987 is about 44410.6292119353. The cubic root of 1972303987 is about 1254.0781974016.

The spelling of 1972303987 in words is "one billion, nine hundred seventy-two million, three hundred three thousand, nine hundred eighty-seven".