70890047 has 2 divisors, whose sum is σ = 70890048. Its totient is φ = 70890046.

The previous prime is 70890031. The next prime is 70890067. The reversal of 70890047 is 74009807.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 70890047 - 2⁴ = 70890031 is a prime.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 70889989 and 70890016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70890067) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35445023 + 35445024.

It is an arithmetic number, because the mean of its divisors is an integer number (35445024).

Almost surely, 2^70890047 is an apocalyptic number.

70890047 is a deficient number, since it is larger than the sum of its proper divisors (1).

70890047 is an equidigital number, since it uses as much as digits as its factorization.

70890047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 14112, while the sum is 35.

The square root of 70890047 is about 8419.6227350161. The cubic root of 70890047 is about 413.8679108273.

The spelling of 70890047 in words is "seventy million, eight hundred ninety thousand, forty-seven".