61900829 has 2 divisors, whose sum is σ = 61900830. Its totient is φ = 61900828.

The previous prime is 61900823. The next prime is 61900849. The reversal of 61900829 is 92800916.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60808804 + 1092025 = 7798^2 + 1045^2 .

It is a cyclic number.

It is not a de Polignac number, because 61900829 - 2¹² = 61896733 is a prime.

It is equal to p_3668057 and since 61900829 and 3668057 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61900823) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30950414 + 30950415.

It is an arithmetic number, because the mean of its divisors is an integer number (30950415).

Almost surely, 2^61900829 is an apocalyptic number.

It is an amenable number.

61900829 is a deficient number, since it is larger than the sum of its proper divisors (1).

61900829 is an equidigital number, since it uses as much as digits as its factorization.

61900829 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 61900829 is about 7867.7079889889. The cubic root of 61900829 is about 395.5780225103.

The spelling of 61900829 in words is "sixty-one million, nine hundred thousand, eight hundred twenty-nine".