61983969 has 4 divisors (see below), whose sum is σ = 82645296. Its totient is φ = 41322644.

The previous prime is 61983959. The next prime is 61983979. The reversal of 61983969 is 96938916.

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 an interprime number because it is at equal distance from previous prime (61983959) and next prime (61983979).

It is a cyclic number.

It is not a de Polignac number, because 61983969 - 2⁵ = 61983937 is a prime.

It is a super-2 number, since 2×61983969² = 7684024825985922, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (61983959) 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, 10330659 + ... + 10330664.

It is an arithmetic number, because the mean of its divisors is an integer number (20661324).

Almost surely, 2^61983969 is an apocalyptic number.

It is an amenable number.

61983969 is a deficient number, since it is larger than the sum of its proper divisors (20661327).

61983969 is a wasteful number, since it uses less digits than its factorization.

61983969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20661326.

The product of its digits is 629856, while the sum is 51.

The square root of 61983969 is about 7872.9898386826. The cubic root of 61983969 is about 395.7550456832.

The spelling of 61983969 in words is "sixty-one million, nine hundred eighty-three thousand, nine hundred sixty-nine".