61981469 has 8 divisors (see below), whose sum is σ = 68376960. Its totient is φ = 55712800.

The previous prime is 61981441. The next prime is 61981501. The reversal of 61981469 is 96418916.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-61981469 is a prime.

It is a super-2 number, since 2×61981469² = 7683404998795922, 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 (61981069) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30677 + ... + 32634.

It is an arithmetic number, because the mean of its divisors is an integer number (8547120).

Almost surely, 2^61981469 is an apocalyptic number.

It is an amenable number.

61981469 is a deficient number, since it is larger than the sum of its proper divisors (6395491).

61981469 is a wasteful number, since it uses less digits than its factorization.

61981469 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63411.

The product of its digits is 93312, while the sum is 44.

The square root of 61981469 is about 7872.8310663954. The cubic root of 61981469 is about 395.7497249477.

It can be divided in two parts, 6198 and 1469, that added together give a palindrome (7667).

The spelling of 61981469 in words is "sixty-one million, nine hundred eighty-one thousand, four hundred sixty-nine".