397192645 has 8 divisors (see below), whose sum is σ = 482664960. Its totient is φ = 313731600.

The previous prime is 397192643. The next prime is 397192651. The reversal of 397192645 is 546291793.

It is a happy number.

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

It is not a de Polignac number, because 397192645 - 2¹ = 397192643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 397192595 and 397192604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397192643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 502381 + ... + 503170.

It is an arithmetic number, because the mean of its divisors is an integer number (60333120).

Almost surely, 2^397192645 is an apocalyptic number.

It is an amenable number.

397192645 is a deficient number, since it is larger than the sum of its proper divisors (85472315).

397192645 is a wasteful number, since it uses less digits than its factorization.

397192645 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1005635.

The product of its digits is 408240, while the sum is 46.

The square root of 397192645 is about 19929.6925465497. The cubic root of 397192645 is about 735.0785206193.

It can be divided in two parts, 3971926 and 45, that added together give a triangular number (3971971 = T₂₈₁₈).

The spelling of 397192645 in words is "three hundred ninety-seven million, one hundred ninety-two thousand, six hundred forty-five".