920734421 has 2 divisors, whose sum is σ = 920734422. Its totient is φ = 920734420.

The previous prime is 920734387. The next prime is 920734453. The reversal of 920734421 is 124437029.

It is an a-pointer prime, because the next prime (920734453) can be obtained adding 920734421 to its sum of digits (32).

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 467640625 + 453093796 = 21625^2 + 21286^2 .

It is a cyclic number.

It is not a de Polignac number, because 920734421 - 2¹⁰ = 920733397 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (920734621) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 460367210 + 460367211.

It is an arithmetic number, because the mean of its divisors is an integer number (460367211).

Almost surely, 2^920734421 is an apocalyptic number.

It is an amenable number.

920734421 is a deficient number, since it is larger than the sum of its proper divisors (1).

920734421 is an equidigital number, since it uses as much as digits as its factorization.

920734421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 12096, while the sum is 32.

The square root of 920734421 is about 30343.6059327167. The cubic root of 920734421 is about 972.8475579848.

The spelling of 920734421 in words is "nine hundred twenty million, seven hundred thirty-four thousand, four hundred twenty-one".