61452649 has 2 divisors, whose sum is σ = 61452650. Its totient is φ = 61452648.

The previous prime is 61452647. The next prime is 61452661. The reversal of 61452649 is 94625416.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 59907600 + 1545049 = 7740^2 + 1243^2 .

It is a cyclic number.

It is not a de Polignac number, because 61452649 - 2¹ = 61452647 is a prime.

Together with 61452647, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (61452647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30726324 + 30726325.

It is an arithmetic number, because the mean of its divisors is an integer number (30726325).

Almost surely, 2^61452649 is an apocalyptic number.

It is an amenable number.

61452649 is a deficient number, since it is larger than the sum of its proper divisors (1).

61452649 is an equidigital number, since it uses as much as digits as its factorization.

61452649 is an evil number, because the sum of its binary digits is even.

The product of its digits is 51840, while the sum is 37.

The square root of 61452649 is about 7839.1739998548. The cubic root of 61452649 is about 394.6210091290.

The spelling of 61452649 in words is "sixty-one million, four hundred fifty-two thousand, six hundred forty-nine".