1941406109 has 4 divisors (see below), whose sum is σ = 1960254816. Its totient is φ = 1922557404.

The previous prime is 1941406009. The next prime is 1941406123. The reversal of 1941406109 is 9016041491.

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: 9016041491 = 41 ⋅219903451.

It is a cyclic number.

It is not a de Polignac number, because 1941406109 - 2⁸ = 1941405853 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1941406139) 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, 9424199 + ... + 9424404.

It is an arithmetic number, because the mean of its divisors is an integer number (490063704).

Almost surely, 2^1941406109 is an apocalyptic number.

It is an amenable number.

1941406109 is a deficient number, since it is larger than the sum of its proper divisors (18848707).

1941406109 is a wasteful number, since it uses less digits than its factorization.

1941406109 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18848706.

The product of its (nonzero) digits is 7776, while the sum is 35.

The square root of 1941406109 is about 44061.3902299961. The cubic root of 1941406109 is about 1247.4949530654.

The spelling of 1941406109 in words is "one billion, nine hundred forty-one million, four hundred six thousand, one hundred nine".