397039772649 has 16 divisors (see below), whose sum is σ = 576514108800. Its totient is φ = 241586860416.

The previous prime is 397039772627. The next prime is 397039772659. The reversal of 397039772649 is 946277930793.

It is a happy number.

It is not a de Polignac number, because 397039772649 - 2⁵ = 397039772617 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 397039772649.

It is not an unprimeable number, because it can be changed into a prime (397039772609) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 57190389 + ... + 57197330.

It is an arithmetic number, because the mean of its divisors is an integer number (36032131800).

Almost surely, 2^397039772649 is an apocalyptic number.

397039772649 is a gapful number since it is divisible by the number (39) formed by its first and last digit.

It is an amenable number.

397039772649 is a deficient number, since it is larger than the sum of its proper divisors (179474336151).

397039772649 is a wasteful number, since it uses less digits than its factorization.

397039772649 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114387824.

The product of its (nonzero) digits is 108020304, while the sum is 66.

The spelling of 397039772649 in words is "three hundred ninety-seven billion, thirty-nine million, seven hundred seventy-two thousand, six hundred forty-nine".