51603779 has 2 divisors, whose sum is σ = 51603780. Its totient is φ = 51603778.

The previous prime is 51603751. The next prime is 51603781. The reversal of 51603779 is 97730615.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51603779 - 2⁸ = 51603523 is a prime.

Together with 51603781, 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 (51603719) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25801889 + 25801890.

It is an arithmetic number, because the mean of its divisors is an integer number (25801890).

Almost surely, 2^51603779 is an apocalyptic number.

51603779 is a deficient number, since it is larger than the sum of its proper divisors (1).

51603779 is an equidigital number, since it uses as much as digits as its factorization.

51603779 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 39690, while the sum is 38.

The square root of 51603779 is about 7183.5770337625. The cubic root of 51603779 is about 372.3006852272.

The spelling of 51603779 in words is "fifty-one million, six hundred three thousand, seven hundred seventy-nine".