75981889 has 2 divisors, whose sum is σ = 75981890. Its totient is φ = 75981888.

The previous prime is 75981887. The next prime is 75981923. The reversal of 75981889 is 98818957.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 62964225 + 13017664 = 7935^2 + 3608^2 .

It is a cyclic number.

It is not a de Polignac number, because 75981889 - 2¹ = 75981887 is a prime.

Together with 75981887, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (75981883) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37990944 + 37990945.

It is an arithmetic number, because the mean of its divisors is an integer number (37990945).

Almost surely, 2^75981889 is an apocalyptic number.

It is an amenable number.

75981889 is a deficient number, since it is larger than the sum of its proper divisors (1).

75981889 is an equidigital number, since it uses as much as digits as its factorization.

75981889 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 55.

The square root of 75981889 is about 8716.7590881015. The cubic root of 75981889 is about 423.5487088222.

The spelling of 75981889 in words is "seventy-five million, nine hundred eighty-one thousand, eight hundred eighty-nine".