61749397 has 2 divisors, whose sum is σ = 61749398. Its totient is φ = 61749396.

The previous prime is 61749367. The next prime is 61749431. The reversal of 61749397 is 79394716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30902481 + 30846916 = 5559^2 + 5554^2 .

It is a cyclic number.

It is not a de Polignac number, because 61749397 - 2⁷ = 61749269 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61749367) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30874698 + 30874699.

It is an arithmetic number, because the mean of its divisors is an integer number (30874699).

Almost surely, 2^61749397 is an apocalyptic number.

It is an amenable number.

61749397 is a deficient number, since it is larger than the sum of its proper divisors (1).

61749397 is an equidigital number, since it uses as much as digits as its factorization.

61749397 is an evil number, because the sum of its binary digits is even.

The product of its digits is 285768, while the sum is 46.

The square root of 61749397 is about 7858.0784546860. The cubic root of 61749397 is about 395.2551830755.

The spelling of 61749397 in words is "sixty-one million, seven hundred forty-nine thousand, three hundred ninety-seven".