61309433 has 2 divisors, whose sum is σ = 61309434. Its totient is φ = 61309432.

The previous prime is 61309427. The next prime is 61309471. The reversal of 61309433 is 33490316.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60964864 + 344569 = 7808^2 + 587^2 .

It is a cyclic number.

It is not a de Polignac number, because 61309433 - 2⁸ = 61309177 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61309396 and 61309405.

It is not a weakly prime, because it can be changed into another prime (61309033) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30654716 + 30654717.

It is an arithmetic number, because the mean of its divisors is an integer number (30654717).

Almost surely, 2^61309433 is an apocalyptic number.

It is an amenable number.

61309433 is a deficient number, since it is larger than the sum of its proper divisors (1).

61309433 is an equidigital number, since it uses as much as digits as its factorization.

61309433 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5832, while the sum is 29.

The square root of 61309433 is about 7830.0340356859. The cubic root of 61309433 is about 394.3142146348.

Adding to 61309433 its reverse (33490316), we get a palindrome (94799749).

The spelling of 61309433 in words is "sixty-one million, three hundred nine thousand, four hundred thirty-three".