397437146 has 4 divisors (see below), whose sum is σ = 596155722. Its totient is φ = 198718572.

The previous prime is 397437133. The next prime is 397437223. The reversal of 397437146 is 641734793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 641734793 = 7 ⋅91676399.

It can be written as a sum of positive squares in only one way, i.e., 396607225 + 829921 = 19915^2 + 911^2 .

It is a super-3 number, since 3×397437146³ (a number of 27 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 397437097 and 397437106.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99359285 + ... + 99359288.

Almost surely, 2^397437146 is an apocalyptic number.

397437146 is a deficient number, since it is larger than the sum of its proper divisors (198718576).

397437146 is a wasteful number, since it uses less digits than its factorization.

397437146 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198718575.

The product of its digits is 381024, while the sum is 44.

The square root of 397437146 is about 19935.8256914531. The cubic root of 397437146 is about 735.2293211353.

The spelling of 397437146 in words is "three hundred ninety-seven million, four hundred thirty-seven thousand, one hundred forty-six".