397812029 has 2 divisors, whose sum is σ = 397812030. Its totient is φ = 397812028.

The previous prime is 397811993. The next prime is 397812047. The reversal of 397812029 is 920218793.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 397005625 + 806404 = 19925^2 + 898^2 .

It is a cyclic number.

It is not a de Polignac number, because 397812029 - 2⁸ = 397811773 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 (397812629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198906014 + 198906015.

It is an arithmetic number, because the mean of its divisors is an integer number (198906015).

Almost surely, 2^397812029 is an apocalyptic number.

It is an amenable number.

397812029 is a deficient number, since it is larger than the sum of its proper divisors (1).

397812029 is an equidigital number, since it uses as much as digits as its factorization.

397812029 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 54432, while the sum is 41.

The square root of 397812029 is about 19945.2257194548. The cubic root of 397812029 is about 735.4604170965.

The spelling of 397812029 in words is "three hundred ninety-seven million, eight hundred twelve thousand, twenty-nine".