53006691 has 4 divisors (see below), whose sum is σ = 70675592. Its totient is φ = 35337792.

The previous prime is 53006689. The next prime is 53006699. The reversal of 53006691 is 19660035.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 53006691 - 2¹ = 53006689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (53006699) 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, 8834446 + ... + 8834451.

It is an arithmetic number, because the mean of its divisors is an integer number (17668898).

Almost surely, 2^53006691 is an apocalyptic number.

53006691 is a deficient number, since it is larger than the sum of its proper divisors (17668901).

53006691 is a wasteful number, since it uses less digits than its factorization.

53006691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17668900.

The product of its (nonzero) digits is 4860, while the sum is 30.

The square root of 53006691 is about 7280.5694145444. The cubic root of 53006691 is about 375.6443818689.

The spelling of 53006691 in words is "fifty-three million, six thousand, six hundred ninety-one".