397424667749321 has 16 divisors (see below), whose sum is σ = 423839267893440. Its totient is φ = 371354249925120.

The previous prime is 397424667749309. The next prime is 397424667749413. The reversal of 397424667749321 is 123947766424793.

It is a cyclic number.

It is not a de Polignac number, because 397424667749321 - 2⁶ = 397424667749257 is a prime.

It is a super-2 number, since 2×397424667749321² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397424667745321) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 103959515 + ... + 107714576.

It is an arithmetic number, because the mean of its divisors is an integer number (26489954243340).

Almost surely, 2^{397424667749321} is an apocalyptic number.

It is an amenable number.

397424667749321 is a deficient number, since it is larger than the sum of its proper divisors (26414600144119).

397424667749321 is a wasteful number, since it uses less digits than its factorization.

397424667749321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 211674904.

The product of its digits is 2304433152, while the sum is 74.

The spelling of 397424667749321 in words is "three hundred ninety-seven trillion, four hundred twenty-four billion, six hundred sixty-seven million, seven hundred forty-nine thousand, three hundred twenty-one".