149620969 has 2 divisors, whose sum is σ = 149620970. Its totient is φ = 149620968.

The previous prime is 149620949. The next prime is 149621011. The reversal of 149620969 is 969026941.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 122943744 + 26677225 = 11088^2 + 5165^2 .

It is an emirp because it is prime and its reverse (969026941) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 149620969 - 2⁷ = 149620841 is a prime.

It is a super-2 number, since 2×149620969² = 44772868728997922, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (149620949) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 74810484 + 74810485.

It is an arithmetic number, because the mean of its divisors is an integer number (74810485).

Almost surely, 2^149620969 is an apocalyptic number.

It is an amenable number.

149620969 is a deficient number, since it is larger than the sum of its proper divisors (1).

149620969 is an equidigital number, since it uses as much as digits as its factorization.

149620969 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 209952, while the sum is 46.

The square root of 149620969 is about 12231.9650506368. The cubic root of 149620969 is about 530.8813731739.

The spelling of 149620969 in words is "one hundred forty-nine million, six hundred twenty thousand, nine hundred sixty-nine".