158466197 has 4 divisors (see below), whose sum is σ = 167787756. Its totient is φ = 149144640.

The previous prime is 158466167. The next prime is 158466199. The reversal of 158466197 is 791664851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 791664851 = 47 ⋅16843933.

It can be written as a sum of positive squares in 2 ways, for example, as 72607441 + 85858756 = 8521^2 + 9266^2 .

It is a cyclic number.

It is not a de Polignac number, because 158466197 - 2¹⁴ = 158449813 is a prime.

It is a super-2 number, since 2×158466197² = 50223071183285618, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158466199) 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, 4660754 + ... + 4660787.

It is an arithmetic number, because the mean of its divisors is an integer number (41946939).

Almost surely, 2^158466197 is an apocalyptic number.

158466197 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

158466197 is a deficient number, since it is larger than the sum of its proper divisors (9321559).

158466197 is an equidigital number, since it uses as much as digits as its factorization.

158466197 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9321558.

The product of its digits is 362880, while the sum is 47.

The square root of 158466197 is about 12588.3357517982. The cubic root of 158466197 is about 541.1432079201.

The spelling of 158466197 in words is "one hundred fifty-eight million, four hundred sixty-six thousand, one hundred ninety-seven".