61243769 has 4 divisors (see below), whose sum is σ = 62899044. Its totient is φ = 59588496.

The previous prime is 61243753. The next prime is 61243789. The reversal of 61243769 is 96734216.

61243769 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 49168144 + 12075625 = 7012^2 + 3475^2 .

It is a cyclic number.

It is not a de Polignac number, because 61243769 - 2⁴ = 61243753 is a prime.

It is a super-2 number, since 2×61243769² = 7501598482650722, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61243729) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 827582 + ... + 827655.

It is an arithmetic number, because the mean of its divisors is an integer number (15724761).

Almost surely, 2^61243769 is an apocalyptic number.

It is an amenable number.

61243769 is a deficient number, since it is larger than the sum of its proper divisors (1655275).

61243769 is a wasteful number, since it uses less digits than its factorization.

61243769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1655274.

The product of its digits is 54432, while the sum is 38.

The square root of 61243769 is about 7825.8398271368. The cubic root of 61243769 is about 394.1733907485.

The spelling of 61243769 in words is "sixty-one million, two hundred forty-three thousand, seven hundred sixty-nine".