149143997 has 2 divisors, whose sum is σ = 149143998. Its totient is φ = 149143996.

The previous prime is 149143987. The next prime is 149144011. The reversal of 149143997 is 799341941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 135163876 + 13980121 = 11626^2 + 3739^2 .

It is an emirp because it is prime and its reverse (799341941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149143997 - 2⁸ = 149143741 is a prime.

It is a super-2 number, since 2×149143997² = 44487863682272018, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149143987) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74571998 + 74571999.

It is an arithmetic number, because the mean of its divisors is an integer number (74571999).

Almost surely, 2^149143997 is an apocalyptic number.

It is an amenable number.

149143997 is a deficient number, since it is larger than the sum of its proper divisors (1).

149143997 is an equidigital number, since it uses as much as digits as its factorization.

149143997 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 244944, while the sum is 47.

The square root of 149143997 is about 12212.4525382906. The cubic root of 149143997 is about 530.3166459564.

The spelling of 149143997 in words is "one hundred forty-nine million, one hundred forty-three thousand, nine hundred ninety-seven".