1973240887 has 2 divisors, whose sum is σ = 1973240888. Its totient is φ = 1973240886.

The previous prime is 1973240873. The next prime is 1973240891. The reversal of 1973240887 is 7880423791.

It is a strong prime.

It is an emirp because it is prime and its reverse (7880423791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1973240887 - 2¹⁵ = 1973208119 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1973240887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1973240897) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 986620443 + 986620444.

It is an arithmetic number, because the mean of its divisors is an integer number (986620444).

Almost surely, 2^1973240887 is an apocalyptic number.

1973240887 is a deficient number, since it is larger than the sum of its proper divisors (1).

1973240887 is an equidigital number, since it uses as much as digits as its factorization.

1973240887 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 677376, while the sum is 49.

The square root of 1973240887 is about 44421.1761100491. The cubic root of 1973240887 is about 1254.2767401340.

The spelling of 1973240887 in words is "one billion, nine hundred seventy-three million, two hundred forty thousand, eight hundred eighty-seven".