53499729 has 8 divisors (see below), whose sum is σ = 72310432. Its totient is φ = 35177760.

The previous prime is 53499713. The next prime is 53499739. The reversal of 53499729 is 92799435.

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

It is not a de Polignac number, because 53499729 - 2⁴ = 53499713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53499739) 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, 121927 + ... + 122364.

It is an arithmetic number, because the mean of its divisors is an integer number (9038804).

Almost surely, 2^53499729 is an apocalyptic number.

It is an amenable number.

53499729 is a deficient number, since it is larger than the sum of its proper divisors (18810703).

53499729 is a wasteful number, since it uses less digits than its factorization.

53499729 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244367.

The product of its digits is 612360, while the sum is 48.

The square root of 53499729 is about 7314.3508939618. The cubic root of 53499729 is about 376.8054659414.

The spelling of 53499729 in words is "fifty-three million, four hundred ninety-nine thousand, seven hundred twenty-nine".