397609502 has 4 divisors (see below), whose sum is σ = 596414256. Its totient is φ = 198804750.

The previous prime is 397609501. The next prime is 397609543. The reversal of 397609502 is 205906793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 205906793 = 73 ⋅2820641.

It is a self number, because there is not a number n which added to its sum of digits gives 397609502.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (397609501) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99402374 + ... + 99402377.

It is an arithmetic number, because the mean of its divisors is an integer number (149103564).

Almost surely, 2^397609502 is an apocalyptic number.

397609502 is a deficient number, since it is larger than the sum of its proper divisors (198804754).

397609502 is a wasteful number, since it uses less digits than its factorization.

397609502 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198804753.

The product of its (nonzero) digits is 102060, while the sum is 41.

The square root of 397609502 is about 19940.1479934327. The cubic root of 397609502 is about 735.3355877255.

The spelling of 397609502 in words is "three hundred ninety-seven million, six hundred nine thousand, five hundred two".