53971990 has 16 divisors (see below), whose sum is σ = 99519840. Its totient is φ = 21062080.

The previous prime is 53971979. The next prime is 53971993. The reversal of 53971990 is 9917935.

53971990 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (53971993) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 65410 + ... + 66229.

It is an arithmetic number, because the mean of its divisors is an integer number (6219990).

Almost surely, 2^53971990 is an apocalyptic number.

53971990 is a deficient number, since it is larger than the sum of its proper divisors (45547850).

53971990 is a wasteful number, since it uses less digits than its factorization.

53971990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131687.

The product of its (nonzero) digits is 76545, while the sum is 43.

The square root of 53971990 is about 7346.5631420413. The cubic root of 53971990 is about 377.9109510942.

The spelling of 53971990 in words is "fifty-three million, nine hundred seventy-one thousand, nine hundred ninety".