397342251 has 12 divisors (see below), whose sum is σ = 576448080. Its totient is φ = 263736720.

The previous prime is 397342249. The next prime is 397342259. The reversal of 397342251 is 152243793.

It is not a de Polignac number, because 397342251 - 2¹ = 397342249 is a prime.

It is not an unprimeable number, because it can be changed into a prime (397342259) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 94335 + ... + 98456.

It is an arithmetic number, because the mean of its divisors is an integer number (48037340).

Almost surely, 2^397342251 is an apocalyptic number.

397342251 is a deficient number, since it is larger than the sum of its proper divisors (179105829).

397342251 is a wasteful number, since it uses less digits than its factorization.

397342251 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 193026 (or 193023 counting only the distinct ones).

The product of its digits is 45360, while the sum is 36.

The square root of 397342251 is about 19933.4455375883. The cubic root of 397342251 is about 735.1708002340.

The spelling of 397342251 in words is "three hundred ninety-seven million, three hundred forty-two thousand, two hundred fifty-one".