158397647 has 4 divisors (see below), whose sum is σ = 158957640. Its totient is φ = 157837656.

The previous prime is 158397643. The next prime is 158397667. The reversal of 158397647 is 746793851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 746793851 = 557 ⋅1340743.

It is a cyclic number.

It is not a de Polignac number, because 158397647 - 2² = 158397643 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 158397595 and 158397604.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158397643) 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, 279572 + ... + 280137.

It is an arithmetic number, because the mean of its divisors is an integer number (39739410).

Almost surely, 2^158397647 is an apocalyptic number.

158397647 is a deficient number, since it is larger than the sum of its proper divisors (559993).

158397647 is an equidigital number, since it uses as much as digits as its factorization.

158397647 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 559992.

The product of its digits is 1270080, while the sum is 50.

The square root of 158397647 is about 12585.6126986333. The cubic root of 158397647 is about 541.0651666346.

The spelling of 158397647 in words is "one hundred fifty-eight million, three hundred ninety-seven thousand, six hundred forty-seven".