61263689 has 4 divisors (see below), whose sum is σ = 63376260. Its totient is φ = 59151120.

The previous prime is 61263667. The next prime is 61263731. The reversal of 61263689 is 98636216.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 17598025 + 43665664 = 4195^2 + 6608^2 .

It is a cyclic number.

It is not a de Polignac number, because 61263689 - 2¹⁶ = 61198153 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61263659) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1056242 + ... + 1056299.

It is an arithmetic number, because the mean of its divisors is an integer number (15844065).

Almost surely, 2^61263689 is an apocalyptic number.

It is an amenable number.

61263689 is a deficient number, since it is larger than the sum of its proper divisors (2112571).

61263689 is a wasteful number, since it uses less digits than its factorization.

61263689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2112570.

The product of its digits is 93312, while the sum is 41.

The square root of 61263689 is about 7827.1124305200. The cubic root of 61263689 is about 394.2161220768.

The spelling of 61263689 in words is "sixty-one million, two hundred sixty-three thousand, six hundred eighty-nine".