19429969 has 4 divisors (see below), whose sum is σ = 20924596. Its totient is φ = 17935344.

The previous prime is 19429967. The next prime is 19429981. The reversal of 19429969 is 96992491.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96992491 = 53 ⋅1830047.

It can be written as a sum of positive squares in 2 ways, for example, as 8294400 + 11135569 = 2880^2 + 3337^2 .

It is a cyclic number.

It is not a de Polignac number, because 19429969 - 2¹ = 19429967 is a prime.

It is a super-2 number, since 2×19429969² = 755047390681922, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (19429967) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 747294 + ... + 747319.

It is an arithmetic number, because the mean of its divisors is an integer number (5231149).

Almost surely, 2^19429969 is an apocalyptic number.

It is an amenable number.

19429969 is a deficient number, since it is larger than the sum of its proper divisors (1494627).

19429969 is a wasteful number, since it uses less digits than its factorization.

19429969 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1494626.

The product of its digits is 314928, while the sum is 49.

The square root of 19429969 is about 4407.9438517295. The cubic root of 19429969 is about 268.8380289240.

It can be divided in two parts, 1942 and 9969, that added together give a palindrome (11911).

The spelling of 19429969 in words is "nineteen million, four hundred twenty-nine thousand, nine hundred sixty-nine".