158642969 has 4 divisors (see below), whose sum is σ = 160183296. Its totient is φ = 157102644.

The previous prime is 158642959. The next prime is 158642971. The reversal of 158642969 is 969246851.

158642969 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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, and also an emirpimes, since its reverse is a distinct semiprime: 969246851 = 229 ⋅4232519.

It is a cyclic number.

It is not a de Polignac number, because 158642969 - 2⁸ = 158642713 is a prime.

It is a super-2 number, since 2×158642969² = 50335183226269922, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (158642909) 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, 770009 + ... + 770214.

It is an arithmetic number, because the mean of its divisors is an integer number (40045824).

Almost surely, 2^158642969 is an apocalyptic number.

It is an amenable number.

158642969 is a deficient number, since it is larger than the sum of its proper divisors (1540327).

158642969 is a wasteful number, since it uses less digits than its factorization.

158642969 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1540326.

The product of its digits is 933120, while the sum is 50.

The square root of 158642969 is about 12595.3550565278. The cubic root of 158642969 is about 541.3443515944.

The spelling of 158642969 in words is "one hundred fifty-eight million, six hundred forty-two thousand, nine hundred sixty-nine".