158064821 has 2 divisors, whose sum is σ = 158064822. Its totient is φ = 158064820.

The previous prime is 158064779. The next prime is 158064833. The reversal of 158064821 is 128460851.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 155127025 + 2937796 = 12455^2 + 1714^2 .

It is an emirp because it is prime and its reverse (128460851) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 158064821 - 2⁶ = 158064757 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (158064421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79032410 + 79032411.

It is an arithmetic number, because the mean of its divisors is an integer number (79032411).

Almost surely, 2^158064821 is an apocalyptic number.

It is an amenable number.

158064821 is a deficient number, since it is larger than the sum of its proper divisors (1).

158064821 is an equidigital number, since it uses as much as digits as its factorization.

158064821 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 15360, while the sum is 35.

The square root of 158064821 is about 12572.3832665092. The cubic root of 158064821 is about 540.6859378713.

The spelling of 158064821 in words is "one hundred fifty-eight million, sixty-four thousand, eight hundred twenty-one".