61000069 has 4 divisors (see below), whose sum is σ = 65692396. Its totient is φ = 56307744.

The previous prime is 61000039. The next prime is 61000091. The reversal of 61000069 is 96000016.

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 9375844 + 51624225 = 3062^2 + 7185^2 .

It is a cyclic number.

It is not a de Polignac number, because 61000069 - 2¹⁵ = 60967301 is a prime.

It is a super-2 number, since 2×61000069² = 7442016836009522, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61000039) 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, 2346144 + ... + 2346169.

It is an arithmetic number, because the mean of its divisors is an integer number (16423099).

Almost surely, 2^61000069 is an apocalyptic number.

It is an amenable number.

61000069 is a deficient number, since it is larger than the sum of its proper divisors (4692327).

61000069 is a wasteful number, since it uses less digits than its factorization.

61000069 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4692326.

The product of its (nonzero) digits is 324, while the sum is 22.

The square root of 61000069 is about 7810.2540931778. The cubic root of 61000069 is about 393.6498667355.

The spelling of 61000069 in words is "sixty-one million, sixty-nine", and thus it is an aban number and an uban number.