611979949 has 16 divisors (see below), whose sum is σ = 737095680. Its totient is φ = 496352880.

The previous prime is 611979937. The next prime is 611979961. The reversal of 611979949 is 949979116.

It is an interprime number because it is at equal distance from previous prime (611979937) and next prime (611979961).

It is a cyclic number.

It is not a de Polignac number, because 611979949 - 2⁹ = 611979437 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 611979949.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611979989) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 134892 + ... + 139354.

It is an arithmetic number, because the mean of its divisors is an integer number (46068480).

Almost surely, 2^611979949 is an apocalyptic number.

It is an amenable number.

611979949 is a deficient number, since it is larger than the sum of its proper divisors (125115731).

611979949 is a wasteful number, since it uses less digits than its factorization.

611979949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5520.

The product of its digits is 1102248, while the sum is 55.

The square root of 611979949 is about 24738.2284935684. The cubic root of 611979949 is about 849.0092026252.

It can be divided in two parts, 6119 and 79949, that added together give a palindrome (86068).

The spelling of 611979949 in words is "six hundred eleven million, nine hundred seventy-nine thousand, nine hundred forty-nine".