611781041 has 2 divisors, whose sum is σ = 611781042. Its totient is φ = 611781040.

The previous prime is 611781029. The next prime is 611781043. The reversal of 611781041 is 140187116.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 365918641 + 245862400 = 19129^2 + 15680^2 .

It is a cyclic number.

It is not a de Polignac number, because 611781041 - 2²² = 607586737 is a prime.

Together with 611781043, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 611780995 and 611781013.

It is not a weakly prime, because it can be changed into another prime (611781043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 305890520 + 305890521.

It is an arithmetic number, because the mean of its divisors is an integer number (305890521).

Almost surely, 2^611781041 is an apocalyptic number.

It is an amenable number.

611781041 is a deficient number, since it is larger than the sum of its proper divisors (1).

611781041 is an equidigital number, since it uses as much as digits as its factorization.

611781041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1344, while the sum is 29.

The square root of 611781041 is about 24734.2079113118. The cubic root of 611781041 is about 848.9172099479.

The spelling of 611781041 in words is "six hundred eleven million, seven hundred eighty-one thousand, forty-one".