650397889 has 4 divisors (see below), whose sum is σ = 650824240. Its totient is φ = 649971540.

The previous prime is 650397871. The next prime is 650397907. The reversal of 650397889 is 988793056.

It is a happy number.

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 an interprime number because it is at equal distance from previous prime (650397871) and next prime (650397907).

It is a cyclic number.

It is not a de Polignac number, because 650397889 - 2¹⁷ = 650266817 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (650397859) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 210879 + ... + 213940.

It is an arithmetic number, because the mean of its divisors is an integer number (162706060).

Almost surely, 2^650397889 is an apocalyptic number.

It is an amenable number.

650397889 is a deficient number, since it is larger than the sum of its proper divisors (426351).

650397889 is a wasteful number, since it uses less digits than its factorization.

650397889 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426350.

The product of its (nonzero) digits is 3265920, while the sum is 55.

The square root of 650397889 is about 25502.8996194550. The cubic root of 650397889 is about 866.4158216012.

The spelling of 650397889 in words is "six hundred fifty million, three hundred ninety-seven thousand, eight hundred eighty-nine".