148811869 has 4 divisors (see below), whose sum is σ = 149983744. Its totient is φ = 147639996.

The previous prime is 148811849. The next prime is 148811881. The reversal of 148811869 is 968118841.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 968118841 = 127 ⋅7622983.

It is a cyclic number.

It is not a de Polignac number, because 148811869 - 2¹¹ = 148809821 is a prime.

It is a super-2 number, since 2×148811869² = 44289944710546322, 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 (148811809) 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, 585747 + ... + 586000.

It is an arithmetic number, because the mean of its divisors is an integer number (37495936).

Almost surely, 2^148811869 is an apocalyptic number.

It is an amenable number.

148811869 is a deficient number, since it is larger than the sum of its proper divisors (1171875).

148811869 is a wasteful number, since it uses less digits than its factorization.

148811869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1171874.

The product of its digits is 110592, while the sum is 46.

The square root of 148811869 is about 12198.8470356833. The cubic root of 148811869 is about 529.9227002490.

The spelling of 148811869 in words is "one hundred forty-eight million, eight hundred eleven thousand, eight hundred sixty-nine".