61237643 has 2 divisors, whose sum is σ = 61237644. Its totient is φ = 61237642.

The previous prime is 61237639. The next prime is 61237651. The reversal of 61237643 is 34673216.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61237643 - 2² = 61237639 is a prime.

It is not a weakly prime, because it can be changed into another prime (61237343) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30618821 + 30618822.

It is an arithmetic number, because the mean of its divisors is an integer number (30618822).

Almost surely, 2^61237643 is an apocalyptic number.

61237643 is a deficient number, since it is larger than the sum of its proper divisors (1).

61237643 is an equidigital number, since it uses as much as digits as its factorization.

61237643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 18144, while the sum is 32.

The square root of 61237643 is about 7825.4484216561. The cubic root of 61237643 is about 394.1602477151.

The spelling of 61237643 in words is "sixty-one million, two hundred thirty-seven thousand, six hundred forty-three".