80734421 has 2 divisors, whose sum is σ = 80734422. Its totient is φ = 80734420.

The previous prime is 80734403. The next prime is 80734457. The reversal of 80734421 is 12443708.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54612100 + 26122321 = 7390^2 + 5111^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-80734421 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (80784421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 40367210 + 40367211.

It is an arithmetic number, because the mean of its divisors is an integer number (40367211).

Almost surely, 2^80734421 is an apocalyptic number.

It is an amenable number.

80734421 is a deficient number, since it is larger than the sum of its proper divisors (1).

80734421 is an equidigital number, since it uses as much as digits as its factorization.

80734421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 5376, while the sum is 29.

The square root of 80734421 is about 8985.2334972442. The cubic root of 80734421 is about 432.2014753090.

The spelling of 80734421 in words is "eighty million, seven hundred thirty-four thousand, four hundred twenty-one".