70888409 has 2 divisors, whose sum is σ = 70888410. Its totient is φ = 70888408.

The previous prime is 70888397. The next prime is 70888421. The reversal of 70888409 is 90488807.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (70888397) and next prime (70888421).

It can be written as a sum of positive squares in only one way, i.e., 35521600 + 35366809 = 5960^2 + 5947^2 .

It is a cyclic number.

It is not a de Polignac number, because 70888409 - 2⁴ = 70888393 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70888409.

It is not a weakly prime, because it can be changed into another prime (70888429) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35444204 + 35444205.

It is an arithmetic number, because the mean of its divisors is an integer number (35444205).

Almost surely, 2^70888409 is an apocalyptic number.

It is an amenable number.

70888409 is a deficient number, since it is larger than the sum of its proper divisors (1).

70888409 is an equidigital number, since it uses as much as digits as its factorization.

70888409 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 129024, while the sum is 44.

The square root of 70888409 is about 8419.5254616873. The cubic root of 70888409 is about 413.8647231637.

The spelling of 70888409 in words is "seventy million, eight hundred eighty-eight thousand, four hundred nine".