70641061 has 2 divisors, whose sum is σ = 70641062. Its totient is φ = 70641060.

The previous prime is 70641059. The next prime is 70641101. The reversal of 70641061 is 16014607.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 69388900 + 1252161 = 8330^2 + 1119^2 .

It is a cyclic number.

It is not a de Polignac number, because 70641061 - 2¹ = 70641059 is a prime.

Together with 70641059, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70641041) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35320530 + 35320531.

It is an arithmetic number, because the mean of its divisors is an integer number (35320531).

Almost surely, 2^70641061 is an apocalyptic number.

It is an amenable number.

70641061 is a deficient number, since it is larger than the sum of its proper divisors (1).

70641061 is an equidigital number, since it uses as much as digits as its factorization.

70641061 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1008, while the sum is 25.

The square root of 70641061 is about 8404.8236745336. The cubic root of 70641061 is about 413.3828018461.

Adding to 70641061 its reverse (16014607), we get a palindrome (86655668).

The spelling of 70641061 in words is "seventy million, six hundred forty-one thousand, sixty-one".