611008823 has 4 divisors (see below), whose sum is σ = 637574448. Its totient is φ = 584443200.

The previous prime is 611008819. The next prime is 611008829. The reversal of 611008823 is 328800116.

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

It is a cyclic number.

It is not a de Polignac number, because 611008823 - 2² = 611008819 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611008829) 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, 13282778 + ... + 13282823.

It is an arithmetic number, because the mean of its divisors is an integer number (159393612).

Almost surely, 2^611008823 is an apocalyptic number.

611008823 is a deficient number, since it is larger than the sum of its proper divisors (26565625).

611008823 is a wasteful number, since it uses less digits than its factorization.

611008823 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 26565624.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 611008823 is about 24718.5926581592. The cubic root of 611008823 is about 848.5598788544.

Adding to 611008823 its reverse (328800116), we get a palindrome (939808939).

The spelling of 611008823 in words is "six hundred eleven million, eight thousand, eight hundred twenty-three".