70890553 has 2 divisors, whose sum is σ = 70890554. Its totient is φ = 70890552.

The previous prime is 70890551. The next prime is 70890569. The reversal of 70890553 is 35509807.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 61968384 + 8922169 = 7872^2 + 2987^2 .

It is a cyclic number.

It is not a de Polignac number, because 70890553 - 2¹ = 70890551 is a prime.

Together with 70890551, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (70890551) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35445276 + 35445277.

It is an arithmetic number, because the mean of its divisors is an integer number (35445277).

Almost surely, 2^70890553 is an apocalyptic number.

It is an amenable number.

70890553 is a deficient number, since it is larger than the sum of its proper divisors (1).

70890553 is an equidigital number, since it uses as much as digits as its factorization.

70890553 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 37800, while the sum is 37.

The square root of 70890553 is about 8419.6527838148. The cubic root of 70890553 is about 413.8688955290.

The spelling of 70890553 in words is "seventy million, eight hundred ninety thousand, five hundred fifty-three".