70357381 has 2 divisors, whose sum is σ = 70357382. Its totient is φ = 70357380.

The previous prime is 70357369. The next prime is 70357409. The reversal of 70357381 is 18375307.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 68326756 + 2030625 = 8266^2 + 1425^2 .

It is an emirp because it is prime and its reverse (18375307) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70357381 - 2¹⁵ = 70324613 is a prime.

It is a super-2 number, since 2×70357381² = 9900322122358322, which contains 22 as substring.

It is equal to p_4137874 and since 70357381 and 4137874 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70357351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35178690 + 35178691.

It is an arithmetic number, because the mean of its divisors is an integer number (35178691).

Almost surely, 2^70357381 is an apocalyptic number.

It is an amenable number.

70357381 is a deficient number, since it is larger than the sum of its proper divisors (1).

70357381 is an equidigital number, since it uses as much as digits as its factorization.

70357381 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 17640, while the sum is 34.

The square root of 70357381 is about 8387.9306744870. The cubic root of 70357381 is about 412.8287059797.

The spelling of 70357381 in words is "seventy million, three hundred fifty-seven thousand, three hundred eighty-one".