158719997 has 4 divisors (see below), whose sum is σ = 158832960. Its totient is φ = 158607036.

The previous prime is 158719991. The next prime is 158720017. The reversal of 158719997 is 799917851.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 158719997 - 2⁸ = 158719741 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158719991) 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, 54347 + ... + 57192.

It is an arithmetic number, because the mean of its divisors is an integer number (39708240).

Almost surely, 2^158719997 is an apocalyptic number.

It is an amenable number.

158719997 is a deficient number, since it is larger than the sum of its proper divisors (112963).

158719997 is a wasteful number, since it uses less digits than its factorization.

158719997 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112962.

The product of its digits is 1428840, while the sum is 56.

The square root of 158719997 is about 12598.4124793563. The cubic root of 158719997 is about 541.4319527573.

The spelling of 158719997 in words is "one hundred fifty-eight million, seven hundred nineteen thousand, nine hundred ninety-seven".