70061939 has 4 divisors (see below), whose sum is σ = 70742256. Its totient is φ = 69381624.

The previous prime is 70061903. The next prime is 70061993. The reversal of 70061939 is 93916007.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 70061939 - 2¹² = 70057843 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70061899 and 70061908.

It is not an unprimeable number, because it can be changed into a prime (70061039) 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, 340004 + ... + 340209.

It is an arithmetic number, because the mean of its divisors is an integer number (17685564).

Almost surely, 2^70061939 is an apocalyptic number.

70061939 is a deficient number, since it is larger than the sum of its proper divisors (680317).

70061939 is a wasteful number, since it uses less digits than its factorization.

70061939 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 680316.

The product of its (nonzero) digits is 10206, while the sum is 35.

The square root of 70061939 is about 8370.3010101191. The cubic root of 70061939 is about 412.2500504744.

The spelling of 70061939 in words is "seventy million, sixty-one thousand, nine hundred thirty-nine".