611911971 has 12 divisors (see below), whose sum is σ = 964225080. Its totient is φ = 370855680.

The previous prime is 611911961. The next prime is 611911981. The reversal of 611911971 is 179119116.

It is an interprime number because it is at equal distance from previous prime (611911961) and next prime (611911981).

It is not a de Polignac number, because 611911971 - 2¹¹ = 611909923 is a prime.

It is not an unprimeable number, because it can be changed into a prime (611911901) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3090366 + ... + 3090563.

It is an arithmetic number, because the mean of its divisors is an integer number (80352090).

Almost surely, 2^611911971 is an apocalyptic number.

611911971 is a deficient number, since it is larger than the sum of its proper divisors (352313109).

611911971 is a wasteful number, since it uses less digits than its factorization.

611911971 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6180946 (or 6180943 counting only the distinct ones).

The product of its digits is 3402, while the sum is 36.

The square root of 611911971 is about 24736.8545090114. The cubic root of 611911971 is about 848.9777658193.

The spelling of 611911971 in words is "six hundred eleven million, nine hundred eleven thousand, nine hundred seventy-one".