755884021 has 2 divisors, whose sum is σ = 755884022. Its totient is φ = 755884020.

The previous prime is 755883979. The next prime is 755884097. The reversal of 755884021 is 120488557.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 687226225 + 68657796 = 26215^2 + 8286^2 .

It is a cyclic number.

It is not a de Polignac number, because 755884021 - 2²⁵ = 722329589 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (755884421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 377942010 + 377942011.

It is an arithmetic number, because the mean of its divisors is an integer number (377942011).

Almost surely, 2^755884021 is an apocalyptic number.

It is an amenable number.

755884021 is a deficient number, since it is larger than the sum of its proper divisors (1).

755884021 is an equidigital number, since it uses as much as digits as its factorization.

755884021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 89600, while the sum is 40.

The square root of 755884021 is about 27493.3450311162. The cubic root of 755884021 is about 910.9301044511.

The spelling of 755884021 in words is "seven hundred fifty-five million, eight hundred eighty-four thousand, twenty-one".