70819649 has 2 divisors, whose sum is σ = 70819650. Its totient is φ = 70819648.

The previous prime is 70819643. The next prime is 70819663. The reversal of 70819649 is 94691807.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 63091249 + 7728400 = 7943^2 + 2780^2 .

It is a cyclic number.

It is not a de Polignac number, because 70819649 - 2⁸ = 70819393 is a prime.

It is not a weakly prime, because it can be changed into another prime (70819643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35409824 + 35409825.

It is an arithmetic number, because the mean of its divisors is an integer number (35409825).

Almost surely, 2^70819649 is an apocalyptic number.

It is an amenable number.

70819649 is a deficient number, since it is larger than the sum of its proper divisors (1).

70819649 is an equidigital number, since it uses as much as digits as its factorization.

70819649 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 108864, while the sum is 44.

The square root of 70819649 is about 8415.4411054917. The cubic root of 70819649 is about 413.7308670336.

The spelling of 70819649 in words is "seventy million, eight hundred nineteen thousand, six hundred forty-nine".