397619786041 has 9 divisors (see below), whose sum is σ = 410880186639. Its totient is φ = 384774424200.

The previous prime is 397619786033. The next prime is 397619786117. The reversal of 397619786041 is 140687916793.

The square root of 397619786041 is 630571.

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

It can be written as a sum of positive squares in only one way, i.e., 249379385641 + 148240400400 = 499379^2 + 385020^2 .

It is not a de Polignac number, because 397619786041 - 2³ = 397619786033 is a prime.

It is not an unprimeable number, because it can be changed into a prime (397619787041) 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, 19537531 + ... + 19557871.

It is an arithmetic number, because the mean of its divisors is an integer number (45653354071).

Almost surely, 2^397619786041 is an apocalyptic number.

397619786041 is a gapful number since it is divisible by the number (31) formed by its first and last digit.

397619786041 is the 630571-st square number.

397619786041 is the 315286-th centered octagonal number.

It is an amenable number.

397619786041 is a deficient number, since it is larger than the sum of its proper divisors (13260400598).

397619786041 is an frugal number, since it uses more digits than its factorization.

397619786041 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40744 (or 20372 counting only the distinct ones).

The product of its (nonzero) digits is 13716864, while the sum is 61.

The spelling of 397619786041 in words is "three hundred ninety-seven billion, six hundred nineteen million, seven hundred eighty-six thousand, forty-one".