51729699 has 8 divisors (see below), whose sum is σ = 78826240. Its totient is φ = 29559816.

The previous prime is 51729697. The next prime is 51729701. The reversal of 51729699 is 99692715.

It is an interprime number because it is at equal distance from previous prime (51729697) and next prime (51729701).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51729699 - 2¹ = 51729697 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51729697) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1231639 + ... + 1231680.

It is an arithmetic number, because the mean of its divisors is an integer number (9853280).

Almost surely, 2^51729699 is an apocalyptic number.

51729699 is a deficient number, since it is larger than the sum of its proper divisors (27096541).

51729699 is a wasteful number, since it uses less digits than its factorization.

51729699 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2463329.

The product of its digits is 306180, while the sum is 48.

The square root of 51729699 is about 7192.3361295201. The cubic root of 51729699 is about 372.6032601135.

The spelling of 51729699 in words is "fifty-one million, seven hundred twenty-nine thousand, six hundred ninety-nine".