70630409 has 2 divisors, whose sum is σ = 70630410. Its totient is φ = 70630408.

The previous prime is 70630387. The next prime is 70630421. The reversal of 70630409 is 90403607.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 67980025 + 2650384 = 8245^2 + 1628^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70630409 is a prime.

It is not a weakly prime, because it can be changed into another prime (70630709) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35315204 + 35315205.

It is an arithmetic number, because the mean of its divisors is an integer number (35315205).

Almost surely, 2^70630409 is an apocalyptic number.

It is an amenable number.

70630409 is a deficient number, since it is larger than the sum of its proper divisors (1).

70630409 is an equidigital number, since it uses as much as digits as its factorization.

70630409 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 4536, while the sum is 29.

The square root of 70630409 is about 8404.1899669153. The cubic root of 70630409 is about 413.3620227369.

The spelling of 70630409 in words is "seventy million, six hundred thirty thousand, four hundred nine".