1009491549 has 8 divisors (see below), whose sum is σ = 1468351392. Its totient is φ = 611813040.

The previous prime is 1009491541. The next prime is 1009491557. The reversal of 1009491549 is 9451949001.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (1009491541) and next prime (1009491557).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 1009491549 - 2³ = 1009491541 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 1009491549.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1009491541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 15295294 + ... + 15295359.

It is an arithmetic number, because the mean of its divisors is an integer number (183543924).

Almost surely, 2^1009491549 is an apocalyptic number.

It is an amenable number.

1009491549 is a deficient number, since it is larger than the sum of its proper divisors (458859843).

1009491549 is a wasteful number, since it uses less digits than its factorization.

1009491549 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30590667.

The product of its (nonzero) digits is 58320, while the sum is 42.

The square root of 1009491549 is about 31772.4967385316. The cubic root of 1009491549 is about 1003.1538921735.

The spelling of 1009491549 in words is "one billion, nine million, four hundred ninety-one thousand, five hundred forty-nine".