1449550981 has 4 divisors (see below), whose sum is σ = 1469967264. Its totient is φ = 1429134700.

The previous prime is 1449550969. The next prime is 1449551003. The reversal of 1449550981 is 1890559441.

It is a happy number.

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.

It is a cyclic number.

It is not a de Polignac number, because 1449550981 - 2⁹ = 1449550469 is a prime.

It is a super-2 number, since 2×1449550981² = 4202396093036124722, 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 (1449550931) 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, 10208035 + ... + 10208176.

It is an arithmetic number, because the mean of its divisors is an integer number (367491816).

Almost surely, 2^1449550981 is an apocalyptic number.

It is an amenable number.

1449550981 is a deficient number, since it is larger than the sum of its proper divisors (20416283).

1449550981 is an equidigital number, since it uses as much as digits as its factorization.

1449550981 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20416282.

The product of its (nonzero) digits is 259200, while the sum is 46.

The square root of 1449550981 is about 38072.9691644873. The cubic root of 1449550981 is about 1131.7343510983.

The spelling of 1449550981 in words is "one billion, four hundred forty-nine million, five hundred fifty thousand, nine hundred eighty-one".