51927691 has 2 divisors, whose sum is σ = 51927692. Its totient is φ = 51927690.

The previous prime is 51927683. The next prime is 51927713. The reversal of 51927691 is 19672915.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51927691 - 2³ = 51927683 is a prime.

It is not a weakly prime, because it can be changed into another prime (51927091) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25963845 + 25963846.

It is an arithmetic number, because the mean of its divisors is an integer number (25963846).

Almost surely, 2^51927691 is an apocalyptic number.

51927691 is a deficient number, since it is larger than the sum of its proper divisors (1).

51927691 is an equidigital number, since it uses as much as digits as its factorization.

51927691 is an evil number, because the sum of its binary digits is even.

The product of its digits is 34020, while the sum is 40.

The square root of 51927691 is about 7206.0870796848. The cubic root of 51927691 is about 373.0780263567.

The spelling of 51927691 in words is "fifty-one million, nine hundred twenty-seven thousand, six hundred ninety-one".