53990247 has 8 divisors (see below), whose sum is σ = 72021744. Its totient is φ = 35976128.

The previous prime is 53990243. The next prime is 53990273. The reversal of 53990247 is 74209935.

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

It is a cyclic number.

It is not a de Polignac number, because 53990247 - 2² = 53990243 is a prime.

It is a super-2 number, since 2×53990247² = 5829893542242018, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53990243) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7603 + ... + 12875.

It is an arithmetic number, because the mean of its divisors is an integer number (9002718).

Almost surely, 2^53990247 is an apocalyptic number.

53990247 is a deficient number, since it is larger than the sum of its proper divisors (18031497).

53990247 is a wasteful number, since it uses less digits than its factorization.

53990247 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8689.

The product of its (nonzero) digits is 68040, while the sum is 39.

The square root of 53990247 is about 7347.8055907870. The cubic root of 53990247 is about 377.9535580243.

The spelling of 53990247 in words is "fifty-three million, nine hundred ninety thousand, two hundred forty-seven".