397440724041 has 9 divisors (see below), whose sum is σ = 574083777709. Its totient is φ = 264959221836.

The previous prime is 397440724003. The next prime is 397440724073. The reversal of 397440724041 is 140427044793.

The square root of 397440724041 is 630429.

It is a perfect power (a square), and thus also a powerful number.

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 397440724041 - 2¹⁵ = 397440691273 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (397440724001) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 1786216 + ... + 1996358.

Almost surely, 2^397440724041 is an apocalyptic number.

397440724041 is the 630429-th square number.

397440724041 is the 315215-th centered octagonal number.

It is an amenable number.

397440724041 is a deficient number, since it is larger than the sum of its proper divisors (176643053668).

397440724041 is an frugal number, since it uses more digits than its factorization.

397440724041 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 420292 (or 210146 counting only the distinct ones).

The product of its (nonzero) digits is 677376, while the sum is 45.

It can be divided in two parts, 397440 and 724041, that added together give a square (1121481 = 1059²).

The spelling of 397440724041 in words is "three hundred ninety-seven billion, four hundred forty million, seven hundred twenty-four thousand, forty-one".