158353691 has 4 divisors (see below), whose sum is σ = 167668632. Its totient is φ = 149038752.

The previous prime is 158353681. The next prime is 158353693. The reversal of 158353691 is 196353851.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 158353691 - 2²⁶ = 91244827 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (158353693) 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, 4657445 + ... + 4657478.

It is an arithmetic number, because the mean of its divisors is an integer number (41917158).

Almost surely, 2^158353691 is an apocalyptic number.

158353691 is a deficient number, since it is larger than the sum of its proper divisors (9314941).

158353691 is an equidigital number, since it uses as much as digits as its factorization.

158353691 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9314940.

The product of its digits is 97200, while the sum is 41.

The square root of 158353691 is about 12583.8662977640. The cubic root of 158353691 is about 541.0151127329.

The spelling of 158353691 in words is "one hundred fifty-eight million, three hundred fifty-three thousand, six hundred ninety-one".