158640983 has 4 divisors (see below), whose sum is σ = 159393048. Its totient is φ = 157888920.

The previous prime is 158640973. The next prime is 158640997. The reversal of 158640983 is 389046851.

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 158640983 - 2⁴ = 158640967 is a prime.

It is a super-2 number, since 2×158640983² = 50333922974412578, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (158640973) 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, 375716 + ... + 376137.

It is an arithmetic number, because the mean of its divisors is an integer number (39848262).

Almost surely, 2^158640983 is an apocalyptic number.

158640983 is a deficient number, since it is larger than the sum of its proper divisors (752065).

158640983 is an equidigital number, since it uses as much as digits as its factorization.

158640983 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 752064.

The product of its (nonzero) digits is 207360, while the sum is 44.

The square root of 158640983 is about 12595.2762176937. The cubic root of 158640983 is about 541.3420926134.

The spelling of 158640983 in words is "one hundred fifty-eight million, six hundred forty thousand, nine hundred eighty-three".