945208889 has 4 divisors (see below), whose sum is σ = 946937424. Its totient is φ = 943480356.

The previous prime is 945208883. The next prime is 945208907. The reversal of 945208889 is 988802549.

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 945208889 - 2⁸ = 945208633 is a prime.

It is a super-2 number, since 2×945208889² = 1786839687689228642, which contains 22 as substring.

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 945208889.

It is not an unprimeable number, because it can be changed into a prime (945208883) 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 in 3 ways as a sum of consecutive naturals, for example, 863447 + ... + 864540.

It is an arithmetic number, because the mean of its divisors is an integer number (236734356).

Almost surely, 2^945208889 is an apocalyptic number.

It is an amenable number.

945208889 is a deficient number, since it is larger than the sum of its proper divisors (1728535).

945208889 is a wasteful number, since it uses less digits than its factorization.

945208889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1728534.

The product of its (nonzero) digits is 1658880, while the sum is 53.

The square root of 945208889 is about 30744.2496899827. The cubic root of 945208889 is about 981.3921935254.

The spelling of 945208889 in words is "nine hundred forty-five million, two hundred eight thousand, eight hundred eighty-nine".