397912977209 has 8 divisors (see below), whose sum is σ = 435620763552. Its totient is φ = 360460837440.

The previous prime is 397912977157. The next prime is 397912977271. The reversal of 397912977209 is 902779219793.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 397912977209 - 2⁸ = 397912976953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397912977299) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63908384 + ... + 63914609.

It is an arithmetic number, because the mean of its divisors is an integer number (54452595444).

Almost surely, 2^397912977209 is an apocalyptic number.

It is an amenable number.

397912977209 is a deficient number, since it is larger than the sum of its proper divisors (37707786343).

397912977209 is a wasteful number, since it uses less digits than its factorization.

397912977209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 127823287.

The product of its (nonzero) digits is 27005076, while the sum is 65.

The spelling of 397912977209 in words is "three hundred ninety-seven billion, nine hundred twelve million, nine hundred seventy-seven thousand, two hundred nine".