287420379 has 4 divisors (see below), whose sum is σ = 383227176. Its totient is φ = 191613584.

The previous prime is 287420347. The next prime is 287420381. The reversal of 287420379 is 973024782.

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 287420379 - 2⁵ = 287420347 is a prime.

It is a super-2 number, since 2×287420379² = 165220948529007282, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 287420379.

It is not an unprimeable number, because it can be changed into a prime (287420389) 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, 47903394 + ... + 47903399.

It is an arithmetic number, because the mean of its divisors is an integer number (95806794).

Almost surely, 2^287420379 is an apocalyptic number.

287420379 is a deficient number, since it is larger than the sum of its proper divisors (95806797).

287420379 is an equidigital number, since it uses as much as digits as its factorization.

287420379 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95806796.

The product of its (nonzero) digits is 169344, while the sum is 42.

The square root of 287420379 is about 16953.4769000344. The cubic root of 287420379 is about 659.9421276161.

The spelling of 287420379 in words is "two hundred eighty-seven million, four hundred twenty thousand, three hundred seventy-nine".