61443169 has 4 divisors (see below), whose sum is σ = 64677040. Its totient is φ = 58209300.

The previous prime is 61443163. The next prime is 61443181. The reversal of 61443169 is 96134416.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-61443169 is a prime.

It is a super-2 number, since 2×61443169² = 7550526033525122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (61443163) 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, 1616907 + ... + 1616944.

It is an arithmetic number, because the mean of its divisors is an integer number (16169260).

Almost surely, 2^61443169 is an apocalyptic number.

It is an amenable number.

61443169 is a deficient number, since it is larger than the sum of its proper divisors (3233871).

61443169 is a wasteful number, since it uses less digits than its factorization.

61443169 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3233870.

The product of its digits is 15552, while the sum is 34.

The square root of 61443169 is about 7838.5693209922. The cubic root of 61443169 is about 394.6007160003.

The spelling of 61443169 in words is "sixty-one million, four hundred forty-three thousand, one hundred sixty-nine".