402719947 has 4 divisors (see below), whose sum is σ = 460251376. Its totient is φ = 345188520.

The previous prime is 402719929. The next prime is 402719957. The reversal of 402719947 is 749917204.

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 402719947 - 2²⁷ = 268502219 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (402719957) 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, 28765704 + ... + 28765717.

It is an arithmetic number, because the mean of its divisors is an integer number (115062844).

Almost surely, 2^402719947 is an apocalyptic number.

402719947 is a deficient number, since it is larger than the sum of its proper divisors (57531429).

402719947 is an equidigital number, since it uses as much as digits as its factorization.

402719947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57531428.

The product of its (nonzero) digits is 127008, while the sum is 43.

The square root of 402719947 is about 20067.8834708596. The cubic root of 402719947 is about 738.4725903013.

The spelling of 402719947 in words is "four hundred two million, seven hundred nineteen thousand, nine hundred forty-seven".