1449634681 has 4 divisors (see below), whose sum is σ = 1581419664. Its totient is φ = 1317849700.

The previous prime is 1449634673. The next prime is 1449634699. The reversal of 1449634681 is 1864369441.

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: 1864369441 = 11 ⋅169488131.

It is a cyclic number.

It is not a de Polignac number, because 1449634681 - 2³ = 1449634673 is a prime.

It is a super-2 number, since 2×1449634681² = 4202881416715943522, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1449637681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 65892475 + ... + 65892496.

It is an arithmetic number, because the mean of its divisors is an integer number (395354916).

Almost surely, 2^1449634681 is an apocalyptic number.

1449634681 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1449634681 is a deficient number, since it is larger than the sum of its proper divisors (131784983).

1449634681 is a wasteful number, since it uses less digits than its factorization.

1449634681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 131784982.

The product of its digits is 497664, while the sum is 46.

The square root of 1449634681 is about 38074.0683536708. The cubic root of 1449634681 is about 1131.7561335544.

The spelling of 1449634681 in words is "one billion, four hundred forty-nine million, six hundred thirty-four thousand, six hundred eighty-one".