940399549 has 4 divisors (see below), whose sum is σ = 940752736. Its totient is φ = 940046364.

The previous prime is 940399541. The next prime is 940399561. The reversal of 940399549 is 945993049.

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, and also an emirpimes, since its reverse is a distinct semiprime: 945993049 = 30757².

It is a cyclic number.

It is not a de Polignac number, because 940399549 - 2³ = 940399541 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 940399496 and 940399505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (940399541) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 172569 + ... + 177934.

It is an arithmetic number, because the mean of its divisors is an integer number (235188184).

Almost surely, 2^940399549 is an apocalyptic number.

It is an amenable number.

940399549 is a deficient number, since it is larger than the sum of its proper divisors (353187).

940399549 is a wasteful number, since it uses less digits than its factorization.

940399549 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 353186.

The product of its (nonzero) digits is 1574640, while the sum is 52.

The square root of 940399549 is about 30665.9346669884. The cubic root of 940399549 is about 979.7248807755.

The spelling of 940399549 in words is "nine hundred forty million, three hundred ninety-nine thousand, five hundred forty-nine".