397481500907 has 4 divisors (see below), whose sum is σ = 398125717896. Its totient is φ = 396837283920.

The previous prime is 397481500859. The next prime is 397481500951. The reversal of 397481500907 is 709005184793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 709005184793 = 175481 ⋅4040353.

It is a cyclic number.

It is not a de Polignac number, because 397481500907 - 2⁸ = 397481500651 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397481500957) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 322107569 + ... + 322108802.

It is an arithmetic number, because the mean of its divisors is an integer number (99531429474).

Almost surely, 2^397481500907 is an apocalyptic number.

397481500907 is a deficient number, since it is larger than the sum of its proper divisors (644216989).

397481500907 is an equidigital number, since it uses as much as digits as its factorization.

397481500907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 644216988.

The product of its (nonzero) digits is 1905120, while the sum is 53.

The spelling of 397481500907 in words is "three hundred ninety-seven billion, four hundred eighty-one million, five hundred thousand, nine hundred seven".