61144687 has 2 divisors, whose sum is σ = 61144688. Its totient is φ = 61144686.

The previous prime is 61144651. The next prime is 61144711. The reversal of 61144687 is 78644116.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 61144687 - 2¹¹ = 61142639 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (61141687) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 30572343 + 30572344.

It is an arithmetic number, because the mean of its divisors is an integer number (30572344).

Almost surely, 2^61144687 is an apocalyptic number.

61144687 is a deficient number, since it is larger than the sum of its proper divisors (1).

61144687 is an equidigital number, since it uses as much as digits as its factorization.

61144687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 37.

The square root of 61144687 is about 7819.5068258810. The cubic root of 61144687 is about 393.9607075145.

It can be divided in two parts, 6114 and 4687, that added together give a palindrome (10801).

The spelling of 61144687 in words is "sixty-one million, one hundred forty-four thousand, six hundred eighty-seven".