70390247 has 4 divisors (see below), whose sum is σ = 70408296. Its totient is φ = 70372200.

The previous prime is 70390223. The next prime is 70390259. The reversal of 70390247 is 74209307.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 74209307 = 19 ⋅3905753.

It is a cyclic number.

It is not a de Polignac number, because 70390247 - 2¹⁶ = 70324711 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70390277) 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, 473 + ... + 11874.

It is an arithmetic number, because the mean of its divisors is an integer number (17602074).

Almost surely, 2^70390247 is an apocalyptic number.

70390247 is a deficient number, since it is larger than the sum of its proper divisors (18049).

70390247 is a wasteful number, since it uses less digits than its factorization.

70390247 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18048.

The product of its (nonzero) digits is 10584, while the sum is 32.

The square root of 70390247 is about 8389.8895701910. The cubic root of 70390247 is about 412.8929774459.

The spelling of 70390247 in words is "seventy million, three hundred ninety thousand, two hundred forty-seven".