51450779 has 2 divisors, whose sum is σ = 51450780. Its totient is φ = 51450778.

The previous prime is 51450769. The next prime is 51450781. The reversal of 51450779 is 97705415.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51450779 is a prime.

Together with 51450781, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51450709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25725389 + 25725390.

It is an arithmetic number, because the mean of its divisors is an integer number (25725390).

Almost surely, 2^51450779 is an apocalyptic number.

51450779 is a deficient number, since it is larger than the sum of its proper divisors (1).

51450779 is an equidigital number, since it uses as much as digits as its factorization.

51450779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 44100, while the sum is 38.

The square root of 51450779 is about 7172.9198378345. The cubic root of 51450779 is about 371.9323763269.

The spelling of 51450779 in words is "fifty-one million, four hundred fifty thousand, seven hundred seventy-nine".