51379849 has 2 divisors, whose sum is σ = 51379850. Its totient is φ = 51379848.

The previous prime is 51379841. The next prime is 51379859. The reversal of 51379849 is 94897315.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 31843449 + 19536400 = 5643^2 + 4420^2 .

It is a cyclic number.

It is not a de Polignac number, because 51379849 - 2³ = 51379841 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 51379799 and 51379808.

It is not a weakly prime, because it can be changed into another prime (51379841) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25689924 + 25689925.

It is an arithmetic number, because the mean of its divisors is an integer number (25689925).

Almost surely, 2^51379849 is an apocalyptic number.

It is an amenable number.

51379849 is a deficient number, since it is larger than the sum of its proper divisors (1).

51379849 is an equidigital number, since it uses as much as digits as its factorization.

51379849 is an evil number, because the sum of its binary digits is even.

The product of its digits is 272160, while the sum is 46.

The square root of 51379849 is about 7167.9738420282. The cubic root of 51379849 is about 371.7613825067.

The spelling of 51379849 in words is "fifty-one million, three hundred seventy-nine thousand, eight hundred forty-nine".