51004969 has 4 divisors (see below), whose sum is σ = 51869520. Its totient is φ = 50140420.

The previous prime is 51004937. The next prime is 51004979. The reversal of 51004969 is 96940015.

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, and also an emirpimes, since its reverse is a distinct semiprime: 96940015 = 5 ⋅19388003.

It is a cyclic number.

It is not a de Polignac number, because 51004969 - 2⁵ = 51004937 is a prime.

It is a super-2 number, since 2×51004969² = 5203013725381922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51004979) 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, 432187 + ... + 432304.

It is an arithmetic number, because the mean of its divisors is an integer number (12967380).

Almost surely, 2^51004969 is an apocalyptic number.

51004969 is a gapful number since it is divisible by the number (59) formed by its first and last digit.

It is an amenable number.

51004969 is a deficient number, since it is larger than the sum of its proper divisors (864551).

51004969 is an equidigital number, since it uses as much as digits as its factorization.

51004969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 864550.

The product of its (nonzero) digits is 9720, while the sum is 34.

The square root of 51004969 is about 7141.7763196561. The cubic root of 51004969 is about 370.8550204489.

The spelling of 51004969 in words is "fifty-one million, four thousand, nine hundred sixty-nine".