397047149981 has 4 divisors (see below), whose sum is σ = 397070003232. Its totient is φ = 397024296732.

The previous prime is 397047149971. The next prime is 397047149987. The reversal of 397047149981 is 189941740793.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397047149981 is a prime.

It is a super-2 number, since 2×397047149981² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397047149987) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11400545 + ... + 11435318.

It is an arithmetic number, because the mean of its divisors is an integer number (99267500808).

Almost surely, 2^397047149981 is an apocalyptic number.

It is an amenable number.

397047149981 is a deficient number, since it is larger than the sum of its proper divisors (22853251).

397047149981 is a wasteful number, since it uses less digits than its factorization.

397047149981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22853250.

The product of its (nonzero) digits is 13716864, while the sum is 62.

The spelling of 397047149981 in words is "three hundred ninety-seven billion, forty-seven million, one hundred forty-nine thousand, nine hundred eighty-one".