149471269 has 4 divisors (see below), whose sum is σ = 149698060. Its totient is φ = 149244480.

The previous prime is 149471251. The next prime is 149471339. The reversal of 149471269 is 962174941.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 83942244 + 65529025 = 9162^2 + 8095^2 .

It is a cyclic number.

It is not a de Polignac number, because 149471269 - 2⁹ = 149470757 is a prime.

It is a super-2 number, since 2×149471269² = 44683320512940722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (149471209) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 112404 + ... + 113725.

It is an arithmetic number, because the mean of its divisors is an integer number (37424515).

Almost surely, 2^149471269 is an apocalyptic number.

It is an amenable number.

149471269 is a deficient number, since it is larger than the sum of its proper divisors (226791).

149471269 is an equidigital number, since it uses as much as digits as its factorization.

149471269 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 226790.

The product of its digits is 108864, while the sum is 43.

The square root of 149471269 is about 12225.8443062228. The cubic root of 149471269 is about 530.7042601622.

The spelling of 149471269 in words is "one hundred forty-nine million, four hundred seventy-one thousand, two hundred sixty-nine".