70909427 has 4 divisors (see below), whose sum is σ = 72825936. Its totient is φ = 68992920.

The previous prime is 70909409. The next prime is 70909429. The reversal of 70909427 is 72490907.

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: 72490907 = 17 ⋅4264171.

It is a cyclic number.

It is not a de Polignac number, because 70909427 - 2¹⁶ = 70843891 is a prime.

It is a super-3 number, since 3×70909427³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (70909429) 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, 958199 + ... + 958272.

It is an arithmetic number, because the mean of its divisors is an integer number (18206484).

Almost surely, 2^70909427 is an apocalyptic number.

70909427 is a deficient number, since it is larger than the sum of its proper divisors (1916509).

70909427 is a wasteful number, since it uses less digits than its factorization.

70909427 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916508.

The product of its (nonzero) digits is 31752, while the sum is 38.

The square root of 70909427 is about 8420.7735392896. The cubic root of 70909427 is about 413.9056219478.

The spelling of 70909427 in words is "seventy million, nine hundred nine thousand, four hundred twenty-seven".