61038749 has 2 divisors, whose sum is σ = 61038750. Its totient is φ = 61038748.

The previous prime is 61038743. The next prime is 61038763. The reversal of 61038749 is 94783016.

61038749 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39601849 + 21436900 = 6293^2 + 4630^2 .

It is a cyclic number.

It is not a de Polignac number, because 61038749 - 2²⁰ = 59990173 is a prime.

It is a Chen prime.

It is an alternating number because its digits alternate between even and odd.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61038743) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30519374 + 30519375.

It is an arithmetic number, because the mean of its divisors is an integer number (30519375).

Almost surely, 2^61038749 is an apocalyptic number.

It is an amenable number.

61038749 is a deficient number, since it is larger than the sum of its proper divisors (1).

61038749 is an equidigital number, since it uses as much as digits as its factorization.

61038749 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36288, while the sum is 38.

The square root of 61038749 is about 7812.7299326164. The cubic root of 61038749 is about 393.7330533061.

The spelling of 61038749 in words is "sixty-one million, thirty-eight thousand, seven hundred forty-nine".