397229387 has 2 divisors, whose sum is σ = 397229388. Its totient is φ = 397229386.

The previous prime is 397229369. The next prime is 397229401. The reversal of 397229387 is 783922793.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 397229387 - 2⁶ = 397229323 is a prime.

It is not a weakly prime, because it can be changed into another prime (397229087) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198614693 + 198614694.

It is an arithmetic number, because the mean of its divisors is an integer number (198614694).

Almost surely, 2^397229387 is an apocalyptic number.

397229387 is a deficient number, since it is larger than the sum of its proper divisors (1).

397229387 is an equidigital number, since it uses as much as digits as its factorization.

397229387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1143072, while the sum is 50.

The square root of 397229387 is about 19930.6143156703. The cubic root of 397229387 is about 735.1011858780.

The spelling of 397229387 in words is "three hundred ninety-seven million, two hundred twenty-nine thousand, three hundred eighty-seven".