397141739 has 4 divisors (see below), whose sum is σ = 397253424. Its totient is φ = 397030056.

The previous prime is 397141733. The next prime is 397141793. The reversal of 397141739 is 937141793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 937141793 = 7 ⋅133877399.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-397141739 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 397141739.

It is not an unprimeable number, because it can be changed into a prime (397141733) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 50327 + ... + 57680.

It is an arithmetic number, because the mean of its divisors is an integer number (99313356).

Almost surely, 2^397141739 is an apocalyptic number.

397141739 is a deficient number, since it is larger than the sum of its proper divisors (111685).

397141739 is a wasteful number, since it uses less digits than its factorization.

397141739 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111684.

The product of its digits is 142884, while the sum is 44.

The square root of 397141739 is about 19928.4153660044. The cubic root of 397141739 is about 735.0471156185.

The spelling of 397141739 in words is "three hundred ninety-seven million, one hundred forty-one thousand, seven hundred thirty-nine".