70385906 has 4 divisors (see below), whose sum is σ = 105578862. Its totient is φ = 35192952.

The previous prime is 70385897. The next prime is 70385927. The reversal of 70385906 is 60958307.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 60958307 = 31 ⋅1966397.

It can be written as a sum of positive squares in only one way, i.e., 41667025 + 28718881 = 6455^2 + 5359^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 70385906.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 17596475 + ... + 17596478.

Almost surely, 2^70385906 is an apocalyptic number.

70385906 is a deficient number, since it is larger than the sum of its proper divisors (35192956).

70385906 is a wasteful number, since it uses less digits than its factorization.

70385906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 35192955.

The product of its (nonzero) digits is 45360, while the sum is 38.

The square root of 70385906 is about 8389.6308619629. The cubic root of 70385906 is about 412.8844895027.

The spelling of 70385906 in words is "seventy million, three hundred eighty-five thousand, nine hundred six".