70394531 has 2 divisors, whose sum is σ = 70394532. Its totient is φ = 70394530.

The previous prime is 70394509. The next prime is 70394567. The reversal of 70394531 is 13549307.

It is a happy number.

It is a weak prime.

It is an emirp because it is prime and its reverse (13549307) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 70394531 - 2¹⁰ = 70393507 is a prime.

It is a super-2 number, since 2×70394531² = 9910779989419922, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (70394591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35197265 + 35197266.

It is an arithmetic number, because the mean of its divisors is an integer number (35197266).

Almost surely, 2^70394531 is an apocalyptic number.

70394531 is a deficient number, since it is larger than the sum of its proper divisors (1).

70394531 is an equidigital number, since it uses as much as digits as its factorization.

70394531 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 11340, while the sum is 32.

The square root of 70394531 is about 8390.1448736002. The cubic root of 70394531 is about 412.9013535951.

The spelling of 70394531 in words is "seventy million, three hundred ninety-four thousand, five hundred thirty-one".