56702729 has 4 divisors (see below), whose sum is σ = 56903376. Its totient is φ = 56502084.

The previous prime is 56702693. The next prime is 56702747. The reversal of 56702729 is 92720765.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 92720765 = 5 ⋅18544153.

It is a cyclic number.

It is not a de Polignac number, because 56702729 - 2¹² = 56698633 is a prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 56702692 and 56702701.

It is not an unprimeable number, because it can be changed into a prime (56702749) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 99899 + ... + 100464.

It is an arithmetic number, because the mean of its divisors is an integer number (14225844).

Almost surely, 2^56702729 is an apocalyptic number.

It is an amenable number.

56702729 is a deficient number, since it is larger than the sum of its proper divisors (200647).

56702729 is a wasteful number, since it uses less digits than its factorization.

56702729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 200646.

The product of its (nonzero) digits is 52920, while the sum is 38.

The square root of 56702729 is about 7530.1214465638. The cubic root of 56702729 is about 384.1799128904.

The spelling of 56702729 in words is "fifty-six million, seven hundred two thousand, seven hundred twenty-nine".