397440724001 has 2 divisors, whose sum is σ = 397440724002. Its totient is φ = 397440724000.

The previous prime is 397440723983. The next prime is 397440724003. The reversal of 397440724001 is 100427044793.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 392096382976 + 5344341025 = 626176^2 + 73105^2 .

It is a cyclic number.

It is not a de Polignac number, because 397440724001 - 2⁶ = 397440723937 is a prime.

Together with 397440724003, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 397440724001.

It is not a weakly prime, because it can be changed into another prime (397440724003) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 198720362000 + 198720362001.

It is an arithmetic number, because the mean of its divisors is an integer number (198720362001).

Almost surely, 2^397440724001 is an apocalyptic number.

It is an amenable number.

397440724001 is a deficient number, since it is larger than the sum of its proper divisors (1).

397440724001 is an equidigital number, since it uses as much as digits as its factorization.

397440724001 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 169344, while the sum is 41.

Adding to 397440724001 its reverse (100427044793), we get a palindrome (497867768794).

The spelling of 397440724001 in words is "three hundred ninety-seven billion, four hundred forty million, seven hundred twenty-four thousand, one".