397651811 has 8 divisors (see below), whose sum is σ = 422546544. Its totient is φ = 372924160.

The previous prime is 397651801. The next prime is 397651841. The reversal of 397651811 is 118156793.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397651811 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397651801) 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 7 ways as a sum of consecutive naturals, for example, 36845 + ... + 46398.

It is an arithmetic number, because the mean of its divisors is an integer number (52818318).

Almost surely, 2^397651811 is an apocalyptic number.

397651811 is a deficient number, since it is larger than the sum of its proper divisors (24894733).

397651811 is a wasteful number, since it uses less digits than its factorization.

397651811 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 83541.

The product of its digits is 45360, while the sum is 41.

The square root of 397651811 is about 19941.2088650613. The cubic root of 397651811 is about 735.3616687672.

The spelling of 397651811 in words is "three hundred ninety-seven million, six hundred fifty-one thousand, eight hundred eleven".