1912977349 has 4 divisors (see below), whose sum is σ = 1913128000. Its totient is φ = 1912826700.

The previous prime is 1912977307. The next prime is 1912977371. The reversal of 1912977349 is 9437792191.

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: 9437792191 = 3361 ⋅2808031.

It is a cyclic number.

It is not a de Polignac number, because 1912977349 - 2⁹ = 1912976837 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1912977296 and 1912977305.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1912977379) 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, 54327 + ... + 82324.

It is an arithmetic number, because the mean of its divisors is an integer number (478282000).

Almost surely, 2^1912977349 is an apocalyptic number.

It is an amenable number.

1912977349 is a deficient number, since it is larger than the sum of its proper divisors (150651).

1912977349 is a wasteful number, since it uses less digits than its factorization.

1912977349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 150650.

The product of its digits is 857304, while the sum is 52.

The square root of 1912977349 is about 43737.5965160410. The cubic root of 1912977349 is about 1241.3758032110.

The spelling of 1912977349 in words is "one billion, nine hundred twelve million, nine hundred seventy-seven thousand, three hundred forty-nine".