1949401911 has 4 divisors (see below), whose sum is σ = 2599202552. Its totient is φ = 1299601272.

The previous prime is 1949401901. The next prime is 1949401921. The reversal of 1949401911 is 1191049491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1191049491 = 3 ⋅397016497.

It is an interprime number because it is at equal distance from previous prime (1949401901) and next prime (1949401921).

It is not a de Polignac number, because 1949401911 - 2⁵ = 1949401879 is a prime.

It is a super-2 number, since 2×1949401911² = 7600335621220903842, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1949401911.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1949401901) 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, 324900316 + ... + 324900321.

It is an arithmetic number, because the mean of its divisors is an integer number (649800638).

Almost surely, 2^1949401911 is an apocalyptic number.

1949401911 is a deficient number, since it is larger than the sum of its proper divisors (649800641).

1949401911 is an equidigital number, since it uses as much as digits as its factorization.

1949401911 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 649800640.

The product of its (nonzero) digits is 11664, while the sum is 39.

The square root of 1949401911 is about 44152.0317879030. The cubic root of 1949401911 is about 1249.2052358003.

The spelling of 1949401911 in words is "one billion, nine hundred forty-nine million, four hundred one thousand, nine hundred eleven".