70604021 has 2 divisors, whose sum is σ = 70604022. Its totient is φ = 70604020.

The previous prime is 70603993. The next prime is 70604087. The reversal of 70604021 is 12040607.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47803396 + 22800625 = 6914^2 + 4775^2 .

It is a cyclic number.

It is not a de Polignac number, because 70604021 - 2¹⁰ = 70602997 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 70603984 and 70604002.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70604921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35302010 + 35302011.

It is an arithmetic number, because the mean of its divisors is an integer number (35302011).

Almost surely, 2^70604021 is an apocalyptic number.

It is an amenable number.

70604021 is a deficient number, since it is larger than the sum of its proper divisors (1).

70604021 is an equidigital number, since it uses as much as digits as its factorization.

70604021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 336, while the sum is 20.

The square root of 70604021 is about 8402.6198890584. The cubic root of 70604021 is about 413.3105380393.

Adding to 70604021 its reverse (12040607), we get a palindrome (82644628).

The spelling of 70604021 in words is "seventy million, six hundred four thousand, twenty-one".