611653321 has 4 divisors (see below), whose sum is σ = 611708944. Its totient is φ = 611597700.

The previous prime is 611653309. The next prime is 611653369. The reversal of 611653321 is 123356116.

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, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 611653321 - 2¹³ = 611645129 is a prime.

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 611653321.

It is not an unprimeable number, because it can be changed into a prime (611653121) 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, 5175 + ... + 35356.

It is an arithmetic number, because the mean of its divisors is an integer number (152927236).

Almost surely, 2^611653321 is an apocalyptic number.

It is an amenable number.

611653321 is a deficient number, since it is larger than the sum of its proper divisors (55623).

611653321 is a wasteful number, since it uses less digits than its factorization.

611653321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55622.

The product of its digits is 3240, while the sum is 28.

The square root of 611653321 is about 24731.6259271403. The cubic root of 611653321 is about 848.8581303945.

The spelling of 611653321 in words is "six hundred eleven million, six hundred fifty-three thousand, three hundred twenty-one".