70102391 has 2 divisors, whose sum is σ = 70102392. Its totient is φ = 70102390.

The previous prime is 70102313. The next prime is 70102393. The reversal of 70102391 is 19320107.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70102391 - 2¹⁴ = 70086007 is a prime.

Together with 70102393, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70102393) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35051195 + 35051196.

It is an arithmetic number, because the mean of its divisors is an integer number (35051196).

Almost surely, 2^70102391 is an apocalyptic number.

70102391 is a deficient number, since it is larger than the sum of its proper divisors (1).

70102391 is an equidigital number, since it uses as much as digits as its factorization.

70102391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 378, while the sum is 23.

The square root of 70102391 is about 8372.7170619817. The cubic root of 70102391 is about 412.3293761435.

Adding to 70102391 its reverse (19320107), we get a palindrome (89422498).

The spelling of 70102391 in words is "seventy million, one hundred two thousand, three hundred ninety-one".