53690881 has 2 divisors, whose sum is σ = 53690882. Its totient is φ = 53690880.

The previous prime is 53690867. The next prime is 53690887. The reversal of 53690881 is 18809635.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 38937600 + 14753281 = 6240^2 + 3841^2 .

It is a cyclic number.

It is not a de Polignac number, because 53690881 - 2⁷ = 53690753 is a prime.

It is a super-2 number, since 2×53690881² = 5765421405112322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (53690887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26845440 + 26845441.

It is an arithmetic number, because the mean of its divisors is an integer number (26845441).

Almost surely, 2^53690881 is an apocalyptic number.

It is an amenable number.

53690881 is a deficient number, since it is larger than the sum of its proper divisors (1).

53690881 is an equidigital number, since it uses as much as digits as its factorization.

53690881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 53690881 is about 7327.4061577068. The cubic root of 53690881 is about 377.2537018888.

The spelling of 53690881 in words is "fifty-three million, six hundred ninety thousand, eight hundred eighty-one".