61393643 has 2 divisors, whose sum is σ = 61393644. Its totient is φ = 61393642.

The previous prime is 61393583. The next prime is 61393697. The reversal of 61393643 is 34639316.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61393643 - 2¹² = 61389547 is a prime.

It is a super-2 number, since 2×61393643² = 7538358801622898, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (61393043) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30696821 + 30696822.

It is an arithmetic number, because the mean of its divisors is an integer number (30696822).

Almost surely, 2^61393643 is an apocalyptic number.

61393643 is a deficient number, since it is larger than the sum of its proper divisors (1).

61393643 is an equidigital number, since it uses as much as digits as its factorization.

61393643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34992, while the sum is 35.

The square root of 61393643 is about 7835.4095617268. The cubic root of 61393643 is about 394.4946654358.

The spelling of 61393643 in words is "sixty-one million, three hundred ninety-three thousand, six hundred forty-three".