19677313 has 4 divisors (see below), whose sum is σ = 20834820. Its totient is φ = 18519808.

The previous prime is 19677311. The next prime is 19677401. The reversal of 19677313 is 31377691.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31377691 = 1319 ⋅23789.

It can be written as a sum of positive squares in 2 ways, for example, as 6594624 + 13082689 = 2568^2 + 3617^2 .

It is a cyclic number.

It is not a de Polignac number, because 19677313 - 2¹ = 19677311 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19677311) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 578728 + ... + 578761.

It is an arithmetic number, because the mean of its divisors is an integer number (5208705).

Almost surely, 2^19677313 is an apocalyptic number.

It is an amenable number.

19677313 is a deficient number, since it is larger than the sum of its proper divisors (1157507).

19677313 is a wasteful number, since it uses less digits than its factorization.

19677313 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1157506.

The product of its digits is 23814, while the sum is 37.

The square root of 19677313 is about 4435.9117439372. The cubic root of 19677313 is about 269.9739938372.

The spelling of 19677313 in words is "nineteen million, six hundred seventy-seven thousand, three hundred thirteen".