70003621 has 2 divisors, whose sum is σ = 70003622. Its totient is φ = 70003620.

The previous prime is 70003607. The next prime is 70003669. The reversal of 70003621 is 12630007.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 67076100 + 2927521 = 8190^2 + 1711^2 .

It is a cyclic number.

It is not a de Polignac number, because 70003621 - 2⁵ = 70003589 is a prime.

It is a super-2 number, since 2×70003621² = 9801013906223282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70003691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35001810 + 35001811.

It is an arithmetic number, because the mean of its divisors is an integer number (35001811).

Almost surely, 2^70003621 is an apocalyptic number.

It is an amenable number.

70003621 is a deficient number, since it is larger than the sum of its proper divisors (1).

70003621 is an equidigital number, since it uses as much as digits as its factorization.

70003621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 252, while the sum is 19.

The square root of 70003621 is about 8366.8166586821. The cubic root of 70003621 is about 412.1356361317.

Adding to 70003621 its reverse (12630007), we get a palindrome (82633628).

The spelling of 70003621 in words is "seventy million, three thousand, six hundred twenty-one".