51694099 has 2 divisors, whose sum is σ = 51694100. Its totient is φ = 51694098.

The previous prime is 51694091. The next prime is 51694129. The reversal of 51694099 is 99049615.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51694099 - 2³ = 51694091 is a prime.

It is not a weakly prime, because it can be changed into another prime (51694091) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25847049 + 25847050.

It is an arithmetic number, because the mean of its divisors is an integer number (25847050).

Almost surely, 2^51694099 is an apocalyptic number.

51694099 is a deficient number, since it is larger than the sum of its proper divisors (1).

51694099 is an equidigital number, since it uses as much as digits as its factorization.

51694099 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 87480, while the sum is 43.

The square root of 51694099 is about 7189.8608470540. The cubic root of 51694099 is about 372.5177662202.

The spelling of 51694099 in words is "fifty-one million, six hundred ninety-four thousand, ninety-nine".