158961397 has 8 divisors (see below), whose sum is σ = 187530752. Its totient is φ = 131857200.

The previous prime is 158961389. The next prime is 158961409. The reversal of 158961397 is 793169851.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 158961397 - 2³ = 158961389 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 158961397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158961307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 366054 + ... + 366487.

It is an arithmetic number, because the mean of its divisors is an integer number (23441344).

Almost surely, 2^158961397 is an apocalyptic number.

It is an amenable number.

158961397 is a deficient number, since it is larger than the sum of its proper divisors (28569355).

158961397 is an equidigital number, since it uses as much as digits as its factorization.

158961397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 732579.

The product of its digits is 408240, while the sum is 49.

The square root of 158961397 is about 12607.9894114803. The cubic root of 158961397 is about 541.7063048021.

The spelling of 158961397 in words is "one hundred fifty-eight million, nine hundred sixty-one thousand, three hundred ninety-seven".