149971469 has 2 divisors, whose sum is σ = 149971470. Its totient is φ = 149971468.

The previous prime is 149971463. The next prime is 149971513. The reversal of 149971469 is 964179941.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107226025 + 42745444 = 10355^2 + 6538^2 .

It is a cyclic number.

It is not a de Polignac number, because 149971469 - 2¹⁶ = 149905933 is a prime.

It is a super-2 number, since 2×149971469² = 44982883028035922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149971463) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74985734 + 74985735.

It is an arithmetic number, because the mean of its divisors is an integer number (74985735).

Almost surely, 2^149971469 is an apocalyptic number.

It is an amenable number.

149971469 is a deficient number, since it is larger than the sum of its proper divisors (1).

149971469 is an equidigital number, since it uses as much as digits as its factorization.

149971469 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 489888, while the sum is 50.

The square root of 149971469 is about 12246.2838853262. The cubic root of 149971469 is about 531.2955949978.

The spelling of 149971469 in words is "one hundred forty-nine million, nine hundred seventy-one thousand, four hundred sixty-nine".