149401669 has 2 divisors, whose sum is σ = 149401670. Its totient is φ = 149401668.

The previous prime is 149401619. The next prime is 149401691. The reversal of 149401669 is 966104941.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 148108900 + 1292769 = 12170^2 + 1137^2 .

It is a cyclic number.

It is not a de Polignac number, because 149401669 - 2¹³ = 149393477 is a prime.

It is a super-2 number, since 2×149401669² = 44641717399971122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (149401619) 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, 74700834 + 74700835.

It is an arithmetic number, because the mean of its divisors is an integer number (74700835).

Almost surely, 2^149401669 is an apocalyptic number.

It is an amenable number.

149401669 is a deficient number, since it is larger than the sum of its proper divisors (1).

149401669 is an equidigital number, since it uses as much as digits as its factorization.

149401669 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46656, while the sum is 40.

The square root of 149401669 is about 12222.9975456105. The cubic root of 149401669 is about 530.6218747616.

The spelling of 149401669 in words is "one hundred forty-nine million, four hundred one thousand, six hundred sixty-nine".