158706731 has 2 divisors, whose sum is σ = 158706732. Its totient is φ = 158706730.

The previous prime is 158706649. The next prime is 158706767. The reversal of 158706731 is 137607851.

It is a strong prime.

It is an emirp because it is prime and its reverse (137607851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 158706731 - 2¹⁴ = 158690347 is a prime.

It is a super-2 number, since 2×158706731² = 50375652929412722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (158706131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79353365 + 79353366.

It is an arithmetic number, because the mean of its divisors is an integer number (79353366).

Almost surely, 2^158706731 is an apocalyptic number.

158706731 is a deficient number, since it is larger than the sum of its proper divisors (1).

158706731 is an equidigital number, since it uses as much as digits as its factorization.

158706731 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 35280, while the sum is 38.

The square root of 158706731 is about 12597.8859734481. The cubic root of 158706731 is about 541.4168678351.

The spelling of 158706731 in words is "one hundred fifty-eight million, seven hundred six thousand, seven hundred thirty-one".