653651849 has 4 divisors (see below), whose sum is σ = 655626960. Its totient is φ = 651676740.

The previous prime is 653651827. The next prime is 653651891. The reversal of 653651849 is 948156356.

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 a cyclic number.

It is not a de Polignac number, because 653651849 - 2¹⁶ = 653586313 is a prime.

It is a super-2 number, since 2×653651849² = 854521479402237602, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (653651899) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 987059 + ... + 987720.

It is an arithmetic number, because the mean of its divisors is an integer number (163906740).

Almost surely, 2^653651849 is an apocalyptic number.

It is an amenable number.

653651849 is a deficient number, since it is larger than the sum of its proper divisors (1975111).

653651849 is a wasteful number, since it uses less digits than its factorization.

653651849 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1975110.

The product of its digits is 777600, while the sum is 47.

The square root of 653651849 is about 25566.6159082504. The cubic root of 653651849 is about 867.8583200306.

It can be divided in two parts, 6536 and 51849, that added together give a palindrome (58385).

The spelling of 653651849 in words is "six hundred fifty-three million, six hundred fifty-one thousand, eight hundred forty-nine".