981419309 has 4 divisors (see below), whose sum is σ = 1056913116. Its totient is φ = 905925504.

The previous prime is 981419281. The next prime is 981419317. The reversal of 981419309 is 903914189.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 903914189 = 19 ⋅47574431.

It can be written as a sum of positive squares in 2 ways, for example, as 607770409 + 373648900 = 24653^2 + 19330^2 .

It is a cyclic number.

It is not a de Polignac number, because 981419309 - 2⁸ = 981419053 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 981419309.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (981019309) 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, 37746884 + ... + 37746909.

It is an arithmetic number, because the mean of its divisors is an integer number (264228279).

Almost surely, 2^981419309 is an apocalyptic number.

It is an amenable number.

981419309 is a deficient number, since it is larger than the sum of its proper divisors (75493807).

981419309 is a wasteful number, since it uses less digits than its factorization.

981419309 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 75493806.

The product of its (nonzero) digits is 69984, while the sum is 44.

The square root of 981419309 is about 31327.6125646370. The cubic root of 981419309 is about 993.7676751520.

The spelling of 981419309 in words is "nine hundred eighty-one million, four hundred nineteen thousand, three hundred nine".