1914938509 has 8 divisors (see below), whose sum is σ = 2089955520. Its totient is φ = 1740076800.

The previous prime is 1914938453. The next prime is 1914938569. The reversal of 1914938509 is 9058394191.

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

It is not a de Polignac number, because 1914938509 - 2⁷ = 1914938381 is a prime.

It is a super-2 number, since 2×1914938509² = 7333978986502286162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1914938569) 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, 12244 + ... + 63085.

It is an arithmetic number, because the mean of its divisors is an integer number (261244440).

Almost surely, 2^1914938509 is an apocalyptic number.

It is an amenable number.

1914938509 is a deficient number, since it is larger than the sum of its proper divisors (175017011).

1914938509 is a wasteful number, since it uses less digits than its factorization.

1914938509 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 77651.

The product of its (nonzero) digits is 349920, while the sum is 49.

The square root of 1914938509 is about 43760.0103861962. The cubic root of 1914938509 is about 1241.7998725451.

It can be divided in two parts, 191493 and 8509, that added together give a palindrome (200002).

The spelling of 1914938509 in words is "one billion, nine hundred fourteen million, nine hundred thirty-eight thousand, five hundred nine".