1509789479 has 12 divisors (see below), whose sum is σ = 1661471112. Its totient is φ = 1370922960.

The previous prime is 1509789389. The next prime is 1509789493. The reversal of 1509789479 is 9749879051.

It is not a de Polignac number, because 1509789479 - 2¹² = 1509785383 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 (1509789179) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102869 + ... + 116625.

It is an arithmetic number, because the mean of its divisors is an integer number (138455926).

Almost surely, 2^1509789479 is an apocalyptic number.

1509789479 is a deficient number, since it is larger than the sum of its proper divisors (151681633).

1509789479 is a wasteful number, since it uses less digits than its factorization.

1509789479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14686 (or 14675 counting only the distinct ones).

The product of its (nonzero) digits is 5715360, while the sum is 59.

The square root of 1509789479 is about 38856.0095609418. The cubic root of 1509789479 is about 1147.1991016039.

The spelling of 1509789479 in words is "one billion, five hundred nine million, seven hundred eighty-nine thousand, four hundred seventy-nine".