70280389 has 2 divisors, whose sum is σ = 70280390. Its totient is φ = 70280388.

The previous prime is 70280381. The next prime is 70280401. The reversal of 70280389 is 98308207.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46922500 + 23357889 = 6850^2 + 4833^2 .

It is an emirp because it is prime and its reverse (98308207) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70280389 - 2³ = 70280381 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70280381) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35140194 + 35140195.

It is an arithmetic number, because the mean of its divisors is an integer number (35140195).

Almost surely, 2^70280389 is an apocalyptic number.

It is an amenable number.

70280389 is a deficient number, since it is larger than the sum of its proper divisors (1).

70280389 is an equidigital number, since it uses as much as digits as its factorization.

70280389 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 24192, while the sum is 37.

The square root of 70280389 is about 8383.3399668628. The cubic root of 70280389 is about 412.6780650270.

The spelling of 70280389 in words is "seventy million, two hundred eighty thousand, three hundred eighty-nine".