70670389 has 4 divisors (see below), whose sum is σ = 70692256. Its totient is φ = 70648524.

The previous prime is 70670381. The next prime is 70670399. The reversal of 70670389 is 98307607.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 98307607 = 83 ⋅1184429.

It is a cyclic number.

It is not a de Polignac number, because 70670389 - 2³ = 70670381 is a prime.

It is a super-2 number, since 2×70670389² = 9988607762822642, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70670381) 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, 5019 + ... + 12904.

It is an arithmetic number, because the mean of its divisors is an integer number (17673064).

Almost surely, 2^70670389 is an apocalyptic number.

It is an amenable number.

70670389 is a deficient number, since it is larger than the sum of its proper divisors (21867).

70670389 is a wasteful number, since it uses less digits than its factorization.

70670389 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21866.

The product of its (nonzero) digits is 63504, while the sum is 40.

The square root of 70670389 is about 8406.5682058733. The cubic root of 70670389 is about 413.4400018807.

The spelling of 70670389 in words is "seventy million, six hundred seventy thousand, three hundred eighty-nine".