70321487 has 2 divisors, whose sum is σ = 70321488. Its totient is φ = 70321486.

The previous prime is 70321439. The next prime is 70321523. The reversal of 70321487 is 78412307.

It is a happy number.

It is a strong prime.

It is an emirp because it is prime and its reverse (78412307) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70321487 - 2¹² = 70317391 is a prime.

It is a super-2 number, since 2×70321487² = 9890223067782338, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70321187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35160743 + 35160744.

It is an arithmetic number, because the mean of its divisors is an integer number (35160744).

Almost surely, 2^70321487 is an apocalyptic number.

70321487 is a deficient number, since it is larger than the sum of its proper divisors (1).

70321487 is an equidigital number, since it uses as much as digits as its factorization.

70321487 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9408, while the sum is 32.

The square root of 70321487 is about 8385.7907796462. The cubic root of 70321487 is about 412.7584902043.

The spelling of 70321487 in words is "seventy million, three hundred twenty-one thousand, four hundred eighty-seven".