53908381 has 2 divisors, whose sum is σ = 53908382. Its totient is φ = 53908380.

The previous prime is 53908333. The next prime is 53908397. The reversal of 53908381 is 18380935.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49928356 + 3980025 = 7066^2 + 1995^2 .

It is a cyclic number.

It is not a de Polignac number, because 53908381 - 2¹⁷ = 53777309 is a prime.

It is a super-2 number, since 2×53908381² = 5812227084082322, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 53908381.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53908321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26954190 + 26954191.

It is an arithmetic number, because the mean of its divisors is an integer number (26954191).

Almost surely, 2^53908381 is an apocalyptic number.

It is an amenable number.

53908381 is a deficient number, since it is larger than the sum of its proper divisors (1).

53908381 is an equidigital number, since it uses as much as digits as its factorization.

53908381 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 25920, while the sum is 37.

The square root of 53908381 is about 7342.2326985734. The cubic root of 53908381 is about 377.7624296885.

It can be divided in two parts, 53908 and 381, that added together give a square (54289 = 233²).

The spelling of 53908381 in words is "fifty-three million, nine hundred eight thousand, three hundred eighty-one".