70643051 has 4 divisors (see below), whose sum is σ = 73714512. Its totient is φ = 67571592.

The previous prime is 70643047. The next prime is 70643071. The reversal of 70643051 is 15034607.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15034607 = 7 ⋅2147801.

It is a cyclic number.

It is not a de Polignac number, because 70643051 - 2² = 70643047 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70643051.

It is not an unprimeable number, because it can be changed into a prime (70643071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1535696 + ... + 1535741.

It is an arithmetic number, because the mean of its divisors is an integer number (18428628).

Almost surely, 2^70643051 is an apocalyptic number.

70643051 is a deficient number, since it is larger than the sum of its proper divisors (3071461).

70643051 is a wasteful number, since it uses less digits than its factorization.

70643051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3071460.

The product of its (nonzero) digits is 2520, while the sum is 26.

The square root of 70643051 is about 8404.9420580989. The cubic root of 70643051 is about 413.3866835547.

Adding to 70643051 its reverse (15034607), we get a palindrome (85677658).

The spelling of 70643051 in words is "seventy million, six hundred forty-three thousand, fifty-one".