40069019 has 4 divisors (see below), whose sum is σ = 41361600. Its totient is φ = 38776440.

The previous prime is 40068979. The next prime is 40069021. The reversal of 40069019 is 91096004.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 40069019 - 2¹² = 40064923 is a prime.

It is a super-2 number, since 2×40069019² = 3211052567244722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 40068982 and 40069000.

It is not an unprimeable number, because it can be changed into a prime (40069079) 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, 646244 + ... + 646305.

It is an arithmetic number, because the mean of its divisors is an integer number (10340400).

Almost surely, 2^40069019 is an apocalyptic number.

40069019 is a deficient number, since it is larger than the sum of its proper divisors (1292581).

40069019 is a wasteful number, since it uses less digits than its factorization.

40069019 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1292580.

The product of its (nonzero) digits is 1944, while the sum is 29.

The square root of 40069019 is about 6330.0093996771. The cubic root of 40069019 is about 342.1917776923.

The spelling of 40069019 in words is "forty million, sixty-nine thousand, nineteen".