1966938349 has 4 divisors (see below), whose sum is σ = 2070461440. Its totient is φ = 1863415260.

The previous prime is 1966938343. The next prime is 1966938409. The reversal of 1966938349 is 9438396691.

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.

It is a cyclic number.

It is not a de Polignac number, because 1966938349 - 2⁵ = 1966938317 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 1966938293 and 1966938302.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1966938343) 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, 51761517 + ... + 51761554.

It is an arithmetic number, because the mean of its divisors is an integer number (517615360).

Almost surely, 2^1966938349 is an apocalyptic number.

1966938349 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

1966938349 is a deficient number, since it is larger than the sum of its proper divisors (103523091).

1966938349 is a wasteful number, since it uses less digits than its factorization.

1966938349 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103523090.

The product of its digits is 7558272, while the sum is 58.

The square root of 1966938349 is about 44350.1786805871. The cubic root of 1966938349 is about 1252.9399278253.

The spelling of 1966938349 in words is "one billion, nine hundred sixty-six million, nine hundred thirty-eight thousand, three hundred forty-nine".