51969679 has 2 divisors, whose sum is σ = 51969680. Its totient is φ = 51969678.

The previous prime is 51969667. The next prime is 51969683. The reversal of 51969679 is 97696915.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51969679 - 2²¹ = 49872527 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51969079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25984839 + 25984840.

It is an arithmetic number, because the mean of its divisors is an integer number (25984840).

Almost surely, 2^51969679 is an apocalyptic number.

51969679 is a deficient number, since it is larger than the sum of its proper divisors (1).

51969679 is an equidigital number, since it uses as much as digits as its factorization.

51969679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 918540, while the sum is 52.

The square root of 51969679 is about 7208.9998612845. Note that the first 3 decimals coincide. The cubic root of 51969679 is about 373.1785544799.

The spelling of 51969679 in words is "fifty-one million, nine hundred sixty-nine thousand, six hundred seventy-nine".