1840739097 has 4 divisors (see below), whose sum is σ = 2454318800. Its totient is φ = 1227159396.

The previous prime is 1840739077. The next prime is 1840739099. The reversal of 1840739097 is 7909370481.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 7909370481 = 3 ⋅2636456827.

It is not a de Polignac number, because 1840739097 - 2¹⁰ = 1840738073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1840739099) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 306789847 + ... + 306789852.

It is an arithmetic number, because the mean of its divisors is an integer number (613579700).

Almost surely, 2^1840739097 is an apocalyptic number.

It is an amenable number.

1840739097 is a deficient number, since it is larger than the sum of its proper divisors (613579703).

1840739097 is an equidigital number, since it uses as much as digits as its factorization.

1840739097 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 613579702.

The product of its (nonzero) digits is 381024, while the sum is 48.

The square root of 1840739097 is about 42903.8354579168. The cubic root of 1840739097 is about 1225.5491852701.

The spelling of 1840739097 in words is "one billion, eight hundred forty million, seven hundred thirty-nine thousand, ninety-seven".