70487881 has 2 divisors, whose sum is σ = 70487882. Its totient is φ = 70487880.

The previous prime is 70487869. The next prime is 70487903. The reversal of 70487881 is 18878407.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68624656 + 1863225 = 8284^2 + 1365^2 .

It is a cyclic number.

It is not a de Polignac number, because 70487881 - 2⁹ = 70487369 is a prime.

It is a super-2 number, since 2×70487881² = 9937082735740322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (70487381) 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, 35243940 + 35243941.

It is an arithmetic number, because the mean of its divisors is an integer number (35243941).

Almost surely, 2^70487881 is an apocalyptic number.

It is an amenable number.

70487881 is a deficient number, since it is larger than the sum of its proper divisors (1).

70487881 is an equidigital number, since it uses as much as digits as its factorization.

70487881 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 100352, while the sum is 43.

The square root of 70487881 is about 8395.7061049086. The cubic root of 70487881 is about 413.0837887716.

The spelling of 70487881 in words is "seventy million, four hundred eighty-seven thousand, eight hundred eighty-one".