399532093 has 2 divisors, whose sum is σ = 399532094. Its totient is φ = 399532092.

The previous prime is 399532069. The next prime is 399532097. The reversal of 399532093 is 390235993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 363207364 + 36324729 = 19058^2 + 6027^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-399532093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (399532097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 199766046 + 199766047.

It is an arithmetic number, because the mean of its divisors is an integer number (199766047).

Almost surely, 2^399532093 is an apocalyptic number.

It is an amenable number.

399532093 is a deficient number, since it is larger than the sum of its proper divisors (1).

399532093 is an equidigital number, since it uses as much as digits as its factorization.

399532093 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 196830, while the sum is 43.

The square root of 399532093 is about 19988.2989021077. The cubic root of 399532093 is about 736.5188902771.

The spelling of 399532093 in words is "three hundred ninety-nine million, five hundred thirty-two thousand, ninety-three".