70639469 has 2 divisors, whose sum is σ = 70639470. Its totient is φ = 70639468.

The previous prime is 70639441. The next prime is 70639537. The reversal of 70639469 is 96493607.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 57229225 + 13410244 = 7565^2 + 3662^2 .

It is a cyclic number.

It is not a de Polignac number, because 70639469 - 2¹⁶ = 70573933 is a prime.

It is a super-2 number, since 2×70639469² = 9979869161203922, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70635469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35319734 + 35319735.

It is an arithmetic number, because the mean of its divisors is an integer number (35319735).

Almost surely, 2^70639469 is an apocalyptic number.

It is an amenable number.

70639469 is a deficient number, since it is larger than the sum of its proper divisors (1).

70639469 is an equidigital number, since it uses as much as digits as its factorization.

70639469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 244944, while the sum is 44.

The square root of 70639469 is about 8404.7289664807. The cubic root of 70639469 is about 413.3796964267.

The spelling of 70639469 in words is "seventy million, six hundred thirty-nine thousand, four hundred sixty-nine".