70621559 has 2 divisors, whose sum is σ = 70621560. Its totient is φ = 70621558.

The previous prime is 70621547. The next prime is 70621597. The reversal of 70621559 is 95512607.

It is a weak prime.

It is an emirp because it is prime and its reverse (95512607) is a distict prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70621559 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70621259) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35310779 + 35310780.

It is an arithmetic number, because the mean of its divisors is an integer number (35310780).

Almost surely, 2^70621559 is an apocalyptic number.

70621559 is a deficient number, since it is larger than the sum of its proper divisors (1).

70621559 is an equidigital number, since it uses as much as digits as its factorization.

70621559 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 18900, while the sum is 35.

The square root of 70621559 is about 8403.6634273393. The cubic root of 70621559 is about 413.3447572429.

The spelling of 70621559 in words is "seventy million, six hundred twenty-one thousand, five hundred fifty-nine".