61831829 has 2 divisors, whose sum is σ = 61831830. Its totient is φ = 61831828.

The previous prime is 61831811. The next prime is 61831919. The reversal of 61831829 is 92813816.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 58599025 + 3232804 = 7655^2 + 1798^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61831829 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 61831792 and 61831801.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61831729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30915914 + 30915915.

It is an arithmetic number, because the mean of its divisors is an integer number (30915915).

Almost surely, 2^61831829 is an apocalyptic number.

It is an amenable number.

61831829 is a deficient number, since it is larger than the sum of its proper divisors (1).

61831829 is an equidigital number, since it uses as much as digits as its factorization.

61831829 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 20736, while the sum is 38.

The square root of 61831829 is about 7863.3217535594. The cubic root of 61831829 is about 395.4309860757.

The spelling of 61831829 in words is "sixty-one million, eight hundred thirty-one thousand, eight hundred twenty-nine".