70405919 has 2 divisors, whose sum is σ = 70405920. Its totient is φ = 70405918.

The previous prime is 70405913. The next prime is 70405949. The reversal of 70405919 is 91950407.

It is a weak prime.

It is an emirp because it is prime and its reverse (91950407) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70405919 - 2⁴ = 70405903 is a prime.

It is a super-2 number, since 2×70405919² = 9913986860469122, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70405913) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35202959 + 35202960.

It is an arithmetic number, because the mean of its divisors is an integer number (35202960).

Almost surely, 2^70405919 is an apocalyptic number.

70405919 is a deficient number, since it is larger than the sum of its proper divisors (1).

70405919 is an equidigital number, since it uses as much as digits as its factorization.

70405919 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 70405919 is about 8390.8234995142. The cubic root of 70405919 is about 412.9236179530.

The spelling of 70405919 in words is "seventy million, four hundred five thousand, nine hundred nineteen".