872442149 has 2 divisors, whose sum is σ = 872442150. Its totient is φ = 872442148.

The previous prime is 872442143. The next prime is 872442161. The reversal of 872442149 is 941244278.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 513339649 + 359102500 = 22657^2 + 18950^2 .

It is a cyclic number.

It is not a de Polignac number, because 872442149 - 2²⁰ = 871393573 is a prime.

It is a super-2 number, since 2×872442149² = 1522310606703476402, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (872442143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 436221074 + 436221075.

It is an arithmetic number, because the mean of its divisors is an integer number (436221075).

Almost surely, 2^872442149 is an apocalyptic number.

It is an amenable number.

872442149 is a deficient number, since it is larger than the sum of its proper divisors (1).

872442149 is an equidigital number, since it uses as much as digits as its factorization.

872442149 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129024, while the sum is 41.

The square root of 872442149 is about 29537.1316989311. The cubic root of 872442149 is about 955.5326830958.

The spelling of 872442149 in words is "eight hundred seventy-two million, four hundred forty-two thousand, one hundred forty-nine".