61951543 has 2 divisors, whose sum is σ = 61951544. Its totient is φ = 61951542.

The previous prime is 61951529. The next prime is 61951559. The reversal of 61951543 is 34515916.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 61951543 - 2¹³ = 61943351 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 61951499 and 61951508.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61951583) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30975771 + 30975772.

It is an arithmetic number, because the mean of its divisors is an integer number (30975772).

Almost surely, 2^61951543 is an apocalyptic number.

61951543 is a deficient number, since it is larger than the sum of its proper divisors (1).

61951543 is an equidigital number, since it uses as much as digits as its factorization.

61951543 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 16200, while the sum is 34.

The square root of 61951543 is about 7870.9302499768. The cubic root of 61951543 is about 395.6860225056.

The spelling of 61951543 in words is "sixty-one million, nine hundred fifty-one thousand, five hundred forty-three".