51449677 has 4 divisors (see below), whose sum is σ = 53109376. Its totient is φ = 49789980.

The previous prime is 51449669. The next prime is 51449687. The reversal of 51449677 is 77694415.

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: 77694415 = 5 ⋅15538883.

It is a cyclic number.

It is not a de Polignac number, because 51449677 - 2³ = 51449669 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 (51449617) 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, 829803 + ... + 829864.

It is an arithmetic number, because the mean of its divisors is an integer number (13277344).

Almost surely, 2^51449677 is an apocalyptic number.

It is an amenable number.

51449677 is a deficient number, since it is larger than the sum of its proper divisors (1659699).

51449677 is a wasteful number, since it uses less digits than its factorization.

51449677 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1659698.

The product of its digits is 211680, while the sum is 43.

The square root of 51449677 is about 7172.8430207276. The cubic root of 51449677 is about 371.9297208932.

The spelling of 51449677 in words is "fifty-one million, four hundred forty-nine thousand, six hundred seventy-seven".