19409961 has 8 divisors (see below), whose sum is σ = 26772480. Its totient is φ = 12493712.

The previous prime is 19409959. The next prime is 19409969. The reversal of 19409961 is 16990491.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 19409961 - 2¹ = 19409959 is a prime.

It is not an unprimeable number, because it can be changed into a prime (19409969) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 111465 + ... + 111638.

It is an arithmetic number, because the mean of its divisors is an integer number (3346560).

Almost surely, 2^19409961 is an apocalyptic number.

It is an amenable number.

19409961 is a deficient number, since it is larger than the sum of its proper divisors (7362519).

19409961 is a wasteful number, since it uses less digits than its factorization.

19409961 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 223135.

The product of its (nonzero) digits is 17496, while the sum is 39.

The square root of 19409961 is about 4405.6737282736. The cubic root of 19409961 is about 268.7457186266.

The spelling of 19409961 in words is "nineteen million, four hundred nine thousand, nine hundred sixty-one".