70881487 has 2 divisors, whose sum is σ = 70881488. Its totient is φ = 70881486.

The previous prime is 70881463. The next prime is 70881509. The reversal of 70881487 is 78418807.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 70881487 - 2¹⁵ = 70848719 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70881287) 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, 35440743 + 35440744.

It is an arithmetic number, because the mean of its divisors is an integer number (35440744).

Almost surely, 2^70881487 is an apocalyptic number.

70881487 is a deficient number, since it is larger than the sum of its proper divisors (1).

70881487 is an equidigital number, since it uses as much as digits as its factorization.

70881487 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 70881487 is about 8419.1143833541. The cubic root of 70881487 is about 413.8512519211.

The spelling of 70881487 in words is "seventy million, eight hundred eighty-one thousand, four hundred eighty-seven".