53509949 has 8 divisors (see below), whose sum is σ = 54487680. Its totient is φ = 52538976.

The previous prime is 53509927. The next prime is 53509957. The reversal of 53509949 is 94990535.

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

It is a de Polignac number, because none of the positive numbers 2^k-53509949 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53509969) 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, 15914 + ... + 18980.

It is an arithmetic number, because the mean of its divisors is an integer number (6810960).

Almost surely, 2^53509949 is an apocalyptic number.

It is an amenable number.

53509949 is a deficient number, since it is larger than the sum of its proper divisors (977731).

53509949 is a wasteful number, since it uses less digits than its factorization.

53509949 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3379.

The product of its (nonzero) digits is 218700, while the sum is 44.

The square root of 53509949 is about 7315.0494871874. The cubic root of 53509949 is about 376.8294580048.

The spelling of 53509949 in words is "fifty-three million, five hundred nine thousand, nine hundred forty-nine".