61965647 has 2 divisors, whose sum is σ = 61965648. Its totient is φ = 61965646.

The previous prime is 61965643. The next prime is 61965653. The reversal of 61965647 is 74656916.

It is a happy number.

It is a weak prime.

61965647 is a truncatable prime.

It is a cyclic number.

It is not a de Polignac number, because 61965647 - 2² = 61965643 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 61965598 and 61965607.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61965641) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30982823 + 30982824.

It is an arithmetic number, because the mean of its divisors is an integer number (30982824).

Almost surely, 2^61965647 is an apocalyptic number.

61965647 is a deficient number, since it is larger than the sum of its proper divisors (1).

61965647 is an equidigital number, since it uses as much as digits as its factorization.

61965647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 44.

The square root of 61965647 is about 7871.8261540763. The cubic root of 61965647 is about 395.7160477583.

It can be divided in two parts, 619 and 65647, that added together give a palindrome (66266).

The spelling of 61965647 in words is "sixty-one million, nine hundred sixty-five thousand, six hundred forty-seven".