70879649 has 2 divisors, whose sum is σ = 70879650. Its totient is φ = 70879648.

The previous prime is 70879637. The next prime is 70879661. The reversal of 70879649 is 94697807.

It is a happy number.

It is a balanced prime because it is at equal distance from previous prime (70879637) and next prime (70879661).

It can be written as a sum of positive squares in only one way, i.e., 58629649 + 12250000 = 7657^2 + 3500^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70879649 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 70879597 and 70879606.

It is not a weakly prime, because it can be changed into another prime (70879349) 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, 35439824 + 35439825.

It is an arithmetic number, because the mean of its divisors is an integer number (35439825).

Almost surely, 2^70879649 is an apocalyptic number.

It is an amenable number.

70879649 is a deficient number, since it is larger than the sum of its proper divisors (1).

70879649 is an equidigital number, since it uses as much as digits as its factorization.

70879649 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 762048, while the sum is 50.

The square root of 70879649 is about 8419.0052262723. The cubic root of 70879649 is about 413.8476747521.

The spelling of 70879649 in words is "seventy million, eight hundred seventy-nine thousand, six hundred forty-nine".