51938949 has 4 divisors (see below), whose sum is σ = 69251936. Its totient is φ = 34625964.

The previous prime is 51938933. The next prime is 51938959. The reversal of 51938949 is 94983915.

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 not a de Polignac number, because 51938949 - 2⁴ = 51938933 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51938898 and 51938907.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51938959) 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, 8656489 + ... + 8656494.

It is an arithmetic number, because the mean of its divisors is an integer number (17312984).

Almost surely, 2^51938949 is an apocalyptic number.

It is an amenable number.

51938949 is a deficient number, since it is larger than the sum of its proper divisors (17312987).

51938949 is a wasteful number, since it uses less digits than its factorization.

51938949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17312986.

The product of its digits is 349920, while the sum is 48.

The square root of 51938949 is about 7206.8681825048. The cubic root of 51938949 is about 373.1049856973.

The spelling of 51938949 in words is "fifty-one million, nine hundred thirty-eight thousand, nine hundred forty-nine".