1025736889 has 4 divisors (see below), whose sum is σ = 1043122320. Its totient is φ = 1008351460.

The previous prime is 1025736863. The next prime is 1025736923. The reversal of 1025736889 is 9886375201.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1025736889 - 2⁵ = 1025736857 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1025736839) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8692627 + ... + 8692744.

It is an arithmetic number, because the mean of its divisors is an integer number (260780580).

Almost surely, 2^1025736889 is an apocalyptic number.

It is an amenable number.

1025736889 is a deficient number, since it is larger than the sum of its proper divisors (17385431).

1025736889 is an equidigital number, since it uses as much as digits as its factorization.

1025736889 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17385430.

The product of its (nonzero) digits is 725760, while the sum is 49.

The square root of 1025736889 is about 32027.1273922592. The cubic root of 1025736889 is about 1008.5063990050.

The spelling of 1025736889 in words is "one billion, twenty-five million, seven hundred thirty-six thousand, eight hundred eighty-nine".