1900039641 has 4 divisors (see below), whose sum is σ = 2533386192. Its totient is φ = 1266693092.

The previous prime is 1900039639. The next prime is 1900039657. The reversal of 1900039641 is 1469300091.

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.

It is a cyclic number.

It is not a de Polignac number, because 1900039641 - 2¹ = 1900039639 is a prime.

It is a super-2 number, since 2×1900039641² = 7220301274742817762, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1900039601) 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, 316673271 + ... + 316673276.

It is an arithmetic number, because the mean of its divisors is an integer number (633346548).

Almost surely, 2^1900039641 is an apocalyptic number.

It is an amenable number.

1900039641 is a deficient number, since it is larger than the sum of its proper divisors (633346551).

1900039641 is an equidigital number, since it uses as much as digits as its factorization.

1900039641 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 633346550.

The product of its (nonzero) digits is 5832, while the sum is 33.

The square root of 1900039641 is about 43589.4441464903. Note that the first 3 decimals coincide. The cubic root of 1900039641 is about 1238.5709432280.

The spelling of 1900039641 in words is "one billion, nine hundred million, thirty-nine thousand, six hundred forty-one".