397654 has 4 divisors (see below), whose sum is σ = 596484. Its totient is φ = 198826.

The previous prime is 397643. The next prime is 397673. The reversal of 397654 is 456793.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 456793 = 47 ⋅9719.

It is a congruent number.

It is an unprimeable number.

397654 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 99412 + ... + 99415.

It is an arithmetic number, because the mean of its divisors is an integer number (149121).

2³⁹⁷⁶⁵⁴ is an apocalyptic number.

397654 is a deficient number, since it is larger than the sum of its proper divisors (198830).

397654 is a wasteful number, since it uses less digits than its factorization.

397654 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198829.

The product of its digits is 22680, while the sum is 34.

The square root of 397654 is about 630.5981287635. The cubic root of 397654 is about 73.5363018108.

The spelling of 397654 in words is "three hundred ninety-seven thousand, six hundred fifty-four".