61386449 has 2 divisors, whose sum is σ = 61386450. Its totient is φ = 61386448.

The previous prime is 61386383. The next prime is 61386461. The reversal of 61386449 is 94468316.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 61340224 + 46225 = 7832^2 + 215^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61386449 is a prime.

It is a super-2 number, since 2×61386449² = 7536592241659202, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61386049) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30693224 + 30693225.

It is an arithmetic number, because the mean of its divisors is an integer number (30693225).

Almost surely, 2^61386449 is an apocalyptic number.

It is an amenable number.

61386449 is a deficient number, since it is larger than the sum of its proper divisors (1).

61386449 is an equidigital number, since it uses as much as digits as its factorization.

61386449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 124416, while the sum is 41.

The square root of 61386449 is about 7834.9504784651. The cubic root of 61386449 is about 394.4792561016.

The spelling of 61386449 in words is "sixty-one million, three hundred eighty-six thousand, four hundred forty-nine".