1870640993 has 8 divisors (see below), whose sum is σ = 2018227008. Its totient is φ = 1723582224.

The previous prime is 1870640983. The next prime is 1870641007. The reversal of 1870640993 is 3990460781.

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

It is not a de Polignac number, because 1870640993 - 2⁴ = 1870640977 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1870640923) 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, 124421 + ... + 138642.

It is an arithmetic number, because the mean of its divisors is an integer number (252278376).

Almost surely, 2^1870640993 is an apocalyptic number.

1870640993 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

1870640993 is a deficient number, since it is larger than the sum of its proper divisors (147586015).

1870640993 is a wasteful number, since it uses less digits than its factorization.

1870640993 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263623.

The product of its (nonzero) digits is 326592, while the sum is 47.

The square root of 1870640993 is about 43250.9074240067. The cubic root of 1870640993 is about 1232.1497191918.

The spelling of 1870640993 in words is "one billion, eight hundred seventy million, six hundred forty thousand, nine hundred ninety-three".