61808469 has 4 divisors (see below), whose sum is σ = 82411296. Its totient is φ = 41205644.

The previous prime is 61808449. The next prime is 61808471. The reversal of 61808469 is 96480816.

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 not a de Polignac number, because 61808469 - 2⁸ = 61808213 is a prime.

It is a super-2 number, since 2×61808469² = 7640573680247922, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 61808469.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (61808449) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10301409 + ... + 10301414.

It is an arithmetic number, because the mean of its divisors is an integer number (20602824).

Almost surely, 2^61808469 is an apocalyptic number.

It is an amenable number.

61808469 is a deficient number, since it is larger than the sum of its proper divisors (20602827).

61808469 is a wasteful number, since it uses less digits than its factorization.

61808469 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20602826.

The product of its (nonzero) digits is 82944, while the sum is 42.

The square root of 61808469 is about 7861.8362358930. The cubic root of 61808469 is about 395.3811819996.

The spelling of 61808469 in words is "sixty-one million, eight hundred eight thousand, four hundred sixty-nine".