61787461 has 2 divisors, whose sum is σ = 61787462. Its totient is φ = 61787460.

The previous prime is 61787459. The next prime is 61787477. The reversal of 61787461 is 16478716.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61701025 + 86436 = 7855^2 + 294^2 .

It is a cyclic number.

It is not a de Polignac number, because 61787461 - 2¹ = 61787459 is a prime.

Together with 61787459, it forms a pair of twin primes.

It is a Chen prime.

It is the 7861-st Hogben number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61787491) by changing a digit.

It is a nontrivial repunit in base 7860.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30893730 + 30893731.

It is an arithmetic number, because the mean of its divisors is an integer number (30893731).

Almost surely, 2^61787461 is an apocalyptic number.

It is an amenable number.

61787461 is a deficient number, since it is larger than the sum of its proper divisors (1).

61787461 is an equidigital number, since it uses as much as digits as its factorization.

61787461 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 56448, while the sum is 40.

The square root of 61787461 is about 7860.5000477069. The cubic root of 61787461 is about 395.3363817252.

The spelling of 61787461 in words is "sixty-one million, seven hundred eighty-seven thousand, four hundred sixty-one".