1949694155 has 4 divisors (see below), whose sum is σ = 2339632992. Its totient is φ = 1559755320.

The previous prime is 1949694133. The next prime is 1949694163. The reversal of 1949694155 is 5514969491.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 1949694155 - 2⁸ = 1949693899 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1949694097 and 1949694106.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 194969411 + ... + 194969420.

It is an arithmetic number, because the mean of its divisors is an integer number (584908248).

Almost surely, 2^1949694155 is an apocalyptic number.

1949694155 is a deficient number, since it is larger than the sum of its proper divisors (389938837).

1949694155 is an equidigital number, since it uses as much as digits as its factorization.

1949694155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 389938836.

The product of its digits is 1749600, while the sum is 53.

The square root of 1949694155 is about 44155.3411831457. The cubic root of 1949694155 is about 1249.2676574233.

The spelling of 1949694155 in words is "one billion, nine hundred forty-nine million, six hundred ninety-four thousand, one hundred fifty-five".