16949404397 has 4 divisors (see below), whose sum is σ = 16981812960. Its totient is φ = 16916995836.

The previous prime is 16949404369. The next prime is 16949404403. The reversal of 16949404397 is 79340494961.

It is a happy number.

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 16949404397 - 2¹² = 16949400301 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16949404327) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16203497 + ... + 16204542.

It is an arithmetic number, because the mean of its divisors is an integer number (4245453240).

Almost surely, 2^16949404397 is an apocalyptic number.

It is an amenable number.

16949404397 is a deficient number, since it is larger than the sum of its proper divisors (32408563).

16949404397 is an equidigital number, since it uses as much as digits as its factorization.

16949404397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32408562.

The product of its (nonzero) digits is 5878656, while the sum is 56.

The spelling of 16949404397 in words is "sixteen billion, nine hundred forty-nine million, four hundred four thousand, three hundred ninety-seven".