1975072789 has 2 divisors, whose sum is σ = 1975072790. Its totient is φ = 1975072788.

The previous prime is 1975072783. The next prime is 1975072901. The reversal of 1975072789 is 9872705791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 1809821764 + 165251025 = 42542^2 + 12855^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1975072789 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1975072783) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 987536394 + 987536395.

It is an arithmetic number, because the mean of its divisors is an integer number (987536395).

Almost surely, 2^1975072789 is an apocalyptic number.

It is an amenable number.

1975072789 is a deficient number, since it is larger than the sum of its proper divisors (1).

1975072789 is an equidigital number, since it uses as much as digits as its factorization.

1975072789 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2222640, while the sum is 55.

The square root of 1975072789 is about 44441.7910192647. The cubic root of 1975072789 is about 1254.6647653039.

The spelling of 1975072789 in words is "one billion, nine hundred seventy-five million, seventy-two thousand, seven hundred eighty-nine".