32705790421 has 2 divisors, whose sum is σ = 32705790422. Its totient is φ = 32705790420.

The previous prime is 32705790347. The next prime is 32705790431. The reversal of 32705790421 is 12409750723.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20349022500 + 12356767921 = 142650^2 + 111161^2 .

It is an emirp because it is prime and its reverse (12409750723) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 32705790421 - 2¹¹ = 32705788373 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (32705790431) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16352895210 + 16352895211.

It is an arithmetic number, because the mean of its divisors is an integer number (16352895211).

Almost surely, 2^32705790421 is an apocalyptic number.

It is an amenable number.

32705790421 is a deficient number, since it is larger than the sum of its proper divisors (1).

32705790421 is an equidigital number, since it uses as much as digits as its factorization.

32705790421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 105840, while the sum is 40.

The spelling of 32705790421 in words is "thirty-two billion, seven hundred five million, seven hundred ninety thousand, four hundred twenty-one".