1436861149 has 4 divisors (see below), whose sum is σ = 1512485440. Its totient is φ = 1361236860.

The previous prime is 1436861141. The next prime is 1436861177. The reversal of 1436861149 is 9411686341.

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: 9411686341 = 163 ⋅57740407.

It is a cyclic number.

It is not a de Polignac number, because 1436861149 - 2³ = 1436861141 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1436861141) 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, 37812117 + ... + 37812154.

It is an arithmetic number, because the mean of its divisors is an integer number (378121360).

Almost surely, 2^1436861149 is an apocalyptic number.

1436861149 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1436861149 is a deficient number, since it is larger than the sum of its proper divisors (75624291).

1436861149 is an equidigital number, since it uses as much as digits as its factorization.

1436861149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75624290.

The product of its digits is 124416, while the sum is 43.

The square root of 1436861149 is about 37905.9513665071. The cubic root of 1436861149 is about 1128.4221455872.

The spelling of 1436861149 in words is "one billion, four hundred thirty-six million, eight hundred sixty-one thousand, one hundred forty-nine".