158998426 has 4 divisors (see below), whose sum is σ = 238497642. Its totient is φ = 79499212.

The previous prime is 158998421. The next prime is 158998457. The reversal of 158998426 is 624899851.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 624899851 = 3719 ⋅168029.

It can be written as a sum of positive squares in only one way, i.e., 140067225 + 18931201 = 11835^2 + 4351^2 .

It is not an unprimeable number, because it can be changed into a prime (158998421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39749605 + ... + 39749608.

Almost surely, 2^158998426 is an apocalyptic number.

158998426 is a deficient number, since it is larger than the sum of its proper divisors (79499216).

158998426 is an equidigital number, since it uses as much as digits as its factorization.

158998426 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79499215.

The product of its digits is 1244160, while the sum is 52.

The square root of 158998426 is about 12609.4577996042. The cubic root of 158998426 is about 541.7483638299.

The spelling of 158998426 in words is "one hundred fifty-eight million, nine hundred ninety-eight thousand, four hundred twenty-six".