151679821 has 2 divisors, whose sum is σ = 151679822. Its totient is φ = 151679820.

The previous prime is 151679789. The next prime is 151679837. The reversal of 151679821 is 128976151.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 139499721 + 12180100 = 11811^2 + 3490^2 .

It is a cyclic number.

It is not a de Polignac number, because 151679821 - 2⁵ = 151679789 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (151679851) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 75839910 + 75839911.

It is an arithmetic number, because the mean of its divisors is an integer number (75839911).

Almost surely, 2^151679821 is an apocalyptic number.

It is an amenable number.

151679821 is a deficient number, since it is larger than the sum of its proper divisors (1).

151679821 is an equidigital number, since it uses as much as digits as its factorization.

151679821 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 30240, while the sum is 40.

The square root of 151679821 is about 12315.8361876082. The cubic root of 151679821 is about 533.3053443211.

The spelling of 151679821 in words is "one hundred fifty-one million, six hundred seventy-nine thousand, eight hundred twenty-one".