53653949 has 4 divisors (see below), whose sum is σ = 53669436. Its totient is φ = 53638464.

The previous prime is 53653913. The next prime is 53653961. The reversal of 53653949 is 94935635.

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

It can be written as a sum of positive squares in 2 ways, for example, as 31024900 + 22629049 = 5570^2 + 4757^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-53653949 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 (53653979) 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, 107 + ... + 10359.

It is an arithmetic number, because the mean of its divisors is an integer number (13417359).

Almost surely, 2^53653949 is an apocalyptic number.

It is an amenable number.

53653949 is a deficient number, since it is larger than the sum of its proper divisors (15487).

53653949 is a wasteful number, since it uses less digits than its factorization.

53653949 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15486.

The product of its digits is 437400, while the sum is 44.

The square root of 53653949 is about 7324.8855963762. The cubic root of 53653949 is about 377.1671823577.

The spelling of 53653949 in words is "fifty-three million, six hundred fifty-three thousand, nine hundred forty-nine".