611434621 has 4 divisors (see below), whose sum is σ = 698782432. Its totient is φ = 524086812.

The previous prime is 611434619. The next prime is 611434643. The reversal of 611434621 is 126434116.

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 611434621 - 2¹ = 611434619 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 611434621.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611434661) 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, 43673895 + ... + 43673908.

It is an arithmetic number, because the mean of its divisors is an integer number (174695608).

Almost surely, 2^611434621 is an apocalyptic number.

It is an amenable number.

611434621 is a deficient number, since it is larger than the sum of its proper divisors (87347811).

611434621 is an equidigital number, since it uses as much as digits as its factorization.

611434621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 87347810.

The product of its digits is 3456, while the sum is 28.

The square root of 611434621 is about 24727.2040675852. The cubic root of 611434621 is about 848.7569470404.

Adding to 611434621 its reverse (126434116), we get a palindrome (737868737).

The spelling of 611434621 in words is "six hundred eleven million, four hundred thirty-four thousand, six hundred twenty-one".