53943121 has 2 divisors, whose sum is σ = 53943122. Its totient is φ = 53943120.

The previous prime is 53943079. The next prime is 53943139. The reversal of 53943121 is 12134935.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 43086096 + 10857025 = 6564^2 + 3295^2 .

It is a cyclic number.

It is not a de Polignac number, because 53943121 - 2¹³ = 53934929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 53943121.

It is not a weakly prime, because it can be changed into another prime (53943181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26971560 + 26971561.

It is an arithmetic number, because the mean of its divisors is an integer number (26971561).

Almost surely, 2^53943121 is an apocalyptic number.

It is an amenable number.

53943121 is a deficient number, since it is larger than the sum of its proper divisors (1).

53943121 is an equidigital number, since it uses as much as digits as its factorization.

53943121 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 28.

The square root of 53943121 is about 7344.5980829450. The cubic root of 53943121 is about 377.8435589955.

It can be divided in two parts, 5394 and 3121, that added together give a triangular number (8515 = T₁₃₀).

The spelling of 53943121 in words is "fifty-three million, nine hundred forty-three thousand, one hundred twenty-one".