70643351 has 2 divisors, whose sum is σ = 70643352. Its totient is φ = 70643350.

The previous prime is 70643299. The next prime is 70643357. The reversal of 70643351 is 15334607.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70643351 is a prime.

It is a super-3 number, since 3×70643351³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70643357) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35321675 + 35321676.

It is an arithmetic number, because the mean of its divisors is an integer number (35321676).

Almost surely, 2^70643351 is an apocalyptic number.

70643351 is a deficient number, since it is larger than the sum of its proper divisors (1).

70643351 is an equidigital number, since it uses as much as digits as its factorization.

70643351 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7560, while the sum is 29.

The square root of 70643351 is about 8404.9599047229. The cubic root of 70643351 is about 413.3872687306.

Adding to 70643351 its reverse (15334607), we get a palindrome (85977958).

The spelling of 70643351 in words is "seventy million, six hundred forty-three thousand, three hundred fifty-one".