402755947 has 4 divisors (see below), whose sum is σ = 439370136. Its totient is φ = 366141760.

The previous prime is 402755933. The next prime is 402755987. The reversal of 402755947 is 749557204.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-402755947 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402755917) 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, 18307078 + ... + 18307099.

It is an arithmetic number, because the mean of its divisors is an integer number (109842534).

Almost surely, 2^402755947 is an apocalyptic number.

402755947 is a deficient number, since it is larger than the sum of its proper divisors (36614189).

402755947 is a wasteful number, since it uses less digits than its factorization.

402755947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36614188.

The product of its (nonzero) digits is 352800, while the sum is 43.

The square root of 402755947 is about 20068.7804063924. The cubic root of 402755947 is about 738.4945941953.

The spelling of 402755947 in words is "four hundred two million, seven hundred fifty-five thousand, nine hundred forty-seven".