70111649 has 2 divisors, whose sum is σ = 70111650. Its totient is φ = 70111648.

The previous prime is 70111607. The next prime is 70111651. The reversal of 70111649 is 94611107.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 69222400 + 889249 = 8320^2 + 943^2 .

It is a cyclic number.

It is not a de Polignac number, because 70111649 - 2¹² = 70107553 is a prime.

It is a Sophie Germain prime.

Together with 70111651, it forms a pair of twin primes.

It is a Chen prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (70111549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35055824 + 35055825.

It is an arithmetic number, because the mean of its divisors is an integer number (35055825).

Almost surely, 2^70111649 is an apocalyptic number.

It is an amenable number.

70111649 is a deficient number, since it is larger than the sum of its proper divisors (1).

70111649 is an equidigital number, since it uses as much as digits as its factorization.

70111649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1512, while the sum is 29.

The square root of 70111649 is about 8373.2699108532. The cubic root of 70111649 is about 412.3475266292.

The spelling of 70111649 in words is "seventy million, one hundred eleven thousand, six hundred forty-nine".