152999981 has 2 divisors, whose sum is σ = 152999982. Its totient is φ = 152999980.

The previous prime is 152999971. The next prime is 153000031. The reversal of 152999981 is 189999251.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152522500 + 477481 = 12350^2 + 691^2 .

It is a cyclic number.

It is not a de Polignac number, because 152999981 - 2²² = 148805677 is a prime.

It is a super-2 number, since 2×152999981² = 46817988372000722, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (152999971) 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, 76499990 + 76499991.

It is an arithmetic number, because the mean of its divisors is an integer number (76499991).

Almost surely, 2^152999981 is an apocalyptic number.

It is an amenable number.

152999981 is a deficient number, since it is larger than the sum of its proper divisors (1).

152999981 is an equidigital number, since it uses as much as digits as its factorization.

152999981 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 524880, while the sum is 53.

The square root of 152999981 is about 12369.3161088235. The cubic root of 152999981 is about 534.8481019843.

The spelling of 152999981 in words is "one hundred fifty-two million, nine hundred ninety-nine thousand, nine hundred eighty-one".