1936481509 has 4 divisors (see below), whose sum is σ = 2050392204. Its totient is φ = 1822570816.

The previous prime is 1936481507. The next prime is 1936481551. The reversal of 1936481509 is 9051846391.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 1188732484 + 747749025 = 34478^2 + 27345^2 .

It is not a de Polignac number, because 1936481509 - 2¹ = 1936481507 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 (1936481507) 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, 56955322 + ... + 56955355.

It is an arithmetic number, because the mean of its divisors is an integer number (512598051).

Almost surely, 2^1936481509 is an apocalyptic number.

It is an amenable number.

1936481509 is a deficient number, since it is larger than the sum of its proper divisors (113910695).

1936481509 is a wasteful number, since it uses less digits than its factorization.

1936481509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 113910694.

The product of its (nonzero) digits is 233280, while the sum is 46.

The square root of 1936481509 is about 44005.4713530034. The cubic root of 1936481509 is about 1246.4392550945.

The spelling of 1936481509 in words is "one billion, nine hundred thirty-six million, four hundred eighty-one thousand, five hundred nine".