53981429 has 2 divisors, whose sum is σ = 53981430. Its totient is φ = 53981428.

The previous prime is 53981423. The next prime is 53981471. The reversal of 53981429 is 92418935.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 50268100 + 3713329 = 7090^2 + 1927^2 .

It is a cyclic number.

It is not a de Polignac number, because 53981429 - 2⁸ = 53981173 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53981423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26990714 + 26990715.

It is an arithmetic number, because the mean of its divisors is an integer number (26990715).

Almost surely, 2^53981429 is an apocalyptic number.

It is an amenable number.

53981429 is a deficient number, since it is larger than the sum of its proper divisors (1).

53981429 is an equidigital number, since it uses as much as digits as its factorization.

53981429 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 41.

The square root of 53981429 is about 7347.2055231904. The cubic root of 53981429 is about 377.9329803822.

The spelling of 53981429 in words is "fifty-three million, nine hundred eighty-one thousand, four hundred twenty-nine".