70287439 has 4 divisors (see below), whose sum is σ = 70800624. Its totient is φ = 69774256.

The previous prime is 70287421. The next prime is 70287491. The reversal of 70287439 is 93478207.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 93478207 = 1621 ⋅57667.

It is a cyclic number.

It is not a de Polignac number, because 70287439 - 2¹⁵ = 70254671 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 (70281439) 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, 256387 + ... + 256660.

It is an arithmetic number, because the mean of its divisors is an integer number (17700156).

Almost surely, 2^70287439 is an apocalyptic number.

70287439 is a deficient number, since it is larger than the sum of its proper divisors (513185).

70287439 is a wasteful number, since it uses less digits than its factorization.

70287439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 513184.

The product of its (nonzero) digits is 84672, while the sum is 40.

The square root of 70287439 is about 8383.7604331231. The cubic root of 70287439 is about 412.6918634854.

The spelling of 70287439 in words is "seventy million, two hundred eighty-seven thousand, four hundred thirty-nine".