670012531 has 2 divisors, whose sum is σ = 670012532. Its totient is φ = 670012530.

The previous prime is 670012507. The next prime is 670012537. The reversal of 670012531 is 135210076.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 670012531 - 2¹¹ = 670010483 is a prime.

It is a super-2 number, since 2×670012531² = 897833583394051922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 670012496 and 670012505.

It is not a weakly prime, because it can be changed into another prime (670012537) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 335006265 + 335006266.

It is an arithmetic number, because the mean of its divisors is an integer number (335006266).

Almost surely, 2^670012531 is an apocalyptic number.

670012531 is a deficient number, since it is larger than the sum of its proper divisors (1).

670012531 is an equidigital number, since it uses as much as digits as its factorization.

670012531 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1260, while the sum is 25.

The square root of 670012531 is about 25884.6002673404. The cubic root of 670012531 is about 875.0394674987.

The spelling of 670012531 in words is "six hundred seventy million, twelve thousand, five hundred thirty-one".