149581447 has 2 divisors, whose sum is σ = 149581448. Its totient is φ = 149581446.

The previous prime is 149581429. The next prime is 149581511. The reversal of 149581447 is 744185941.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 149581447 - 2²³ = 141192839 is a prime.

It is a super-2 number, since 2×149581447² = 44749218573227618, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149581427) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74790723 + 74790724.

It is an arithmetic number, because the mean of its divisors is an integer number (74790724).

Almost surely, 2^149581447 is an apocalyptic number.

149581447 is a deficient number, since it is larger than the sum of its proper divisors (1).

149581447 is an equidigital number, since it uses as much as digits as its factorization.

149581447 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 161280, while the sum is 43.

The square root of 149581447 is about 12230.3494226453. The cubic root of 149581447 is about 530.8346254009.

The spelling of 149581447 in words is "one hundred forty-nine million, five hundred eighty-one thousand, four hundred forty-seven".