650001553 has 4 divisors (see below), whose sum is σ = 655964980. Its totient is φ = 644038128.

The previous prime is 650001497. The next prime is 650001557. The reversal of 650001553 is 355100056.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 548636929 + 101364624 = 23423^2 + 10068^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-650001553 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (650001557) 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, 2981550 + ... + 2981767.

It is an arithmetic number, because the mean of its divisors is an integer number (163991245).

Almost surely, 2^650001553 is an apocalyptic number.

It is an amenable number.

650001553 is a deficient number, since it is larger than the sum of its proper divisors (5963427).

650001553 is a wasteful number, since it uses less digits than its factorization.

650001553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5963426.

The product of its (nonzero) digits is 2250, while the sum is 25.

The square root of 650001553 is about 25495.1280247815. The cubic root of 650001553 is about 866.2397952221.

The spelling of 650001553 in words is "six hundred fifty million, one thousand, five hundred fifty-three".