70772621 has 2 divisors, whose sum is σ = 70772622. Its totient is φ = 70772620.

The previous prime is 70772599. The next prime is 70772623. The reversal of 70772621 is 12627707.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 70728100 + 44521 = 8410^2 + 211^2 .

It is an emirp because it is prime and its reverse (12627707) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70772621 - 2¹⁴ = 70756237 is a prime.

Together with 70772623, 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 (70772623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35386310 + 35386311.

It is an arithmetic number, because the mean of its divisors is an integer number (35386311).

Almost surely, 2^70772621 is an apocalyptic number.

It is an amenable number.

70772621 is a deficient number, since it is larger than the sum of its proper divisors (1).

70772621 is an equidigital number, since it uses as much as digits as its factorization.

70772621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8232, while the sum is 32.

The square root of 70772621 is about 8412.6464920380. The cubic root of 70772621 is about 413.6392670144.

The spelling of 70772621 in words is "seventy million, seven hundred seventy-two thousand, six hundred twenty-one".