1941940209 has 32 divisors (see below), whose sum is σ = 3120850944. Its totient is φ = 1059534080.

The previous prime is 1941940199. The next prime is 1941940211. The reversal of 1941940209 is 9020491491.

It is not a de Polignac number, because 1941940209 - 2¹¹ = 1941938161 is a prime.

It is a super-2 number, since 2×1941940209² = 7542263550661927362, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (1941940229) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 62349 + ... + 88154.

It is an arithmetic number, because the mean of its divisors is an integer number (97526592).

Almost surely, 2^1941940209 is an apocalyptic number.

It is an amenable number.

1941940209 is a deficient number, since it is larger than the sum of its proper divisors (1178910735).

1941940209 is a wasteful number, since it uses less digits than its factorization.

1941940209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150557.

The product of its (nonzero) digits is 23328, while the sum is 39.

The square root of 1941940209 is about 44067.4506750731. The cubic root of 1941940209 is about 1247.6093419715.

The spelling of 1941940209 in words is "one billion, nine hundred forty-one million, nine hundred forty thousand, two hundred nine".