40019479 has 4 divisors (see below), whose sum is σ = 42373584. Its totient is φ = 37665376.

The previous prime is 40019467. The next prime is 40019489. The reversal of 40019479 is 97491004.

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 40019479 - 2¹³ = 40011287 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 (40019489) 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, 1177027 + ... + 1177060.

It is an arithmetic number, because the mean of its divisors is an integer number (10593396).

Almost surely, 2^40019479 is an apocalyptic number.

40019479 is a deficient number, since it is larger than the sum of its proper divisors (2354105).

40019479 is a wasteful number, since it uses less digits than its factorization.

40019479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2354104.

The product of its (nonzero) digits is 9072, while the sum is 34.

The square root of 40019479 is about 6326.0950830666. The cubic root of 40019479 is about 342.0506946955.

The spelling of 40019479 in words is "forty million, nineteen thousand, four hundred seventy-nine".