70129387 has 2 divisors, whose sum is σ = 70129388. Its totient is φ = 70129386.

The previous prime is 70129379. The next prime is 70129417. The reversal of 70129387 is 78392107.

It is a weak prime.

It is an emirp because it is prime and its reverse (78392107) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70129387 - 2³ = 70129379 is a prime.

It is not a weakly prime, because it can be changed into another prime (70129357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35064693 + 35064694.

It is an arithmetic number, because the mean of its divisors is an integer number (35064694).

Almost surely, 2^70129387 is an apocalyptic number.

70129387 is a deficient number, since it is larger than the sum of its proper divisors (1).

70129387 is an equidigital number, since it uses as much as digits as its factorization.

70129387 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21168, while the sum is 37.

The square root of 70129387 is about 8374.3290477506. The cubic root of 70129387 is about 412.3822978538.

The spelling of 70129387 in words is "seventy million, one hundred twenty-nine thousand, three hundred eighty-seven".