397342477 has 4 divisors (see below), whose sum is σ = 454105696. Its totient is φ = 340579260.

The previous prime is 397342409. The next prime is 397342507. The reversal of 397342477 is 774243793.

397342477 is nontrivially palindromic in base 6.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 774243793 = 563 ⋅1375211.

It is not a de Polignac number, because 397342477 - 2¹⁵ = 397309709 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397342177) 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 3 ways as a sum of consecutive naturals, for example, 28381599 + ... + 28381612.

It is an arithmetic number, because the mean of its divisors is an integer number (113526424).

Almost surely, 2^397342477 is an apocalyptic number.

It is an amenable number.

397342477 is a deficient number, since it is larger than the sum of its proper divisors (56763219).

397342477 is an equidigital number, since it uses as much as digits as its factorization.

397342477 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56763218.

The product of its digits is 889056, while the sum is 46.

The square root of 397342477 is about 19933.4512064519. The cubic root of 397342477 is about 735.1709396172.

The spelling of 397342477 in words is "three hundred ninety-seven million, three hundred forty-two thousand, four hundred seventy-seven".