61844831 has 2 divisors, whose sum is σ = 61844832. Its totient is φ = 61844830.

The previous prime is 61844807. The next prime is 61844833. The reversal of 61844831 is 13844816.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61844831 - 2⁶ = 61844767 is a prime.

It is a super-2 number, since 2×61844831² = 7649566242837122, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 61844833, 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 = 61844791 and 61844800.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61844833) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30922415 + 30922416.

It is an arithmetic number, because the mean of its divisors is an integer number (30922416).

Almost surely, 2^61844831 is an apocalyptic number.

61844831 is a deficient number, since it is larger than the sum of its proper divisors (1).

61844831 is an equidigital number, since it uses as much as digits as its factorization.

61844831 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 18432, while the sum is 35.

The square root of 61844831 is about 7864.1484599415. The cubic root of 61844831 is about 395.4587012155.

The spelling of 61844831 in words is "sixty-one million, eight hundred forty-four thousand, eight hundred thirty-one".