70628907 has 4 divisors (see below), whose sum is σ = 94171880. Its totient is φ = 47085936.

The previous prime is 70628903. The next prime is 70628917. The reversal of 70628907 is 70982607.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 70982607 = 3 ⋅23660869.

It is not a de Polignac number, because 70628907 - 2² = 70628903 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70628903) 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, 11771482 + ... + 11771487.

It is an arithmetic number, because the mean of its divisors is an integer number (23542970).

Almost surely, 2^70628907 is an apocalyptic number.

70628907 is a deficient number, since it is larger than the sum of its proper divisors (23542973).

70628907 is a wasteful number, since it uses less digits than its factorization.

70628907 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23542972.

The product of its (nonzero) digits is 42336, while the sum is 39.

The square root of 70628907 is about 8404.1006062517. The cubic root of 70628907 is about 413.3590925818.

The spelling of 70628907 in words is "seventy million, six hundred twenty-eight thousand, nine hundred seven".