51949759 has 4 divisors (see below), whose sum is σ = 53741160. Its totient is φ = 50158360.

The previous prime is 51949687. The next prime is 51949763. The reversal of 51949759 is 95794915.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51949759 - 2¹¹ = 51947711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51949789) 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, 895657 + ... + 895714.

It is an arithmetic number, because the mean of its divisors is an integer number (13435290).

Almost surely, 2^51949759 is an apocalyptic number.

51949759 is a deficient number, since it is larger than the sum of its proper divisors (1791401).

51949759 is a wasteful number, since it uses less digits than its factorization.

51949759 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1791400.

The product of its digits is 510300, while the sum is 49.

The square root of 51949759 is about 7207.6181225145. The cubic root of 51949759 is about 373.1308685539.

The spelling of 51949759 in words is "fifty-one million, nine hundred forty-nine thousand, seven hundred fifty-nine".