70331587 has 2 divisors, whose sum is σ = 70331588. Its totient is φ = 70331586.

The previous prime is 70331537. The next prime is 70331603. The reversal of 70331587 is 78513307.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70331587 is a prime.

It is not a weakly prime, because it can be changed into another prime (70331507) 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, 35165793 + 35165794.

It is an arithmetic number, because the mean of its divisors is an integer number (35165794).

Almost surely, 2^70331587 is an apocalyptic number.

70331587 is a deficient number, since it is larger than the sum of its proper divisors (1).

70331587 is an equidigital number, since it uses as much as digits as its factorization.

70331587 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 70331587 is about 8386.3929671820. The cubic root of 70331587 is about 412.7782502205.

The spelling of 70331587 in words is "seventy million, three hundred thirty-one thousand, five hundred eighty-seven".