149566971 has 16 divisors (see below), whose sum is σ = 206425088. Its totient is φ = 96228000.

The previous prime is 149566957. The next prime is 149566973. The reversal of 149566971 is 179665941.

149566971 = 405² + 406² + ... + 801².

It is a happy number.

It is not a de Polignac number, because 149566971 - 2⁷ = 149566843 is a prime.

It is a super-2 number, since 2×149566971² = 44740557628229682, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 149566971.

It is not an unprimeable number, because it can be changed into a prime (149566973) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34896 + ... + 38946.

It is an arithmetic number, because the mean of its divisors is an integer number (12901568).

Almost surely, 2^149566971 is an apocalyptic number.

149566971 is a deficient number, since it is larger than the sum of its proper divisors (56858117).

149566971 is a wasteful number, since it uses less digits than its factorization.

149566971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4482.

The product of its digits is 408240, while the sum is 48.

The square root of 149566971 is about 12229.7576018497. The cubic root of 149566971 is about 530.8175007059.

The spelling of 149566971 in words is "one hundred forty-nine million, five hundred sixty-six thousand, nine hundred seventy-one".