70638479 has 4 divisors (see below), whose sum is σ = 70753584. Its totient is φ = 70523376.

The previous prime is 70638467. The next prime is 70638481. The reversal of 70638479 is 97483607.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 97483607 = 13 ⋅7498739.

It is a cyclic number.

It is not a de Polignac number, because 70638479 - 2⁸ = 70638223 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 (70638079) 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, 56627 + ... + 57860.

It is an arithmetic number, because the mean of its divisors is an integer number (17688396).

Almost surely, 2^70638479 is an apocalyptic number.

70638479 is a deficient number, since it is larger than the sum of its proper divisors (115105).

70638479 is a wasteful number, since it uses less digits than its factorization.

70638479 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 115104.

The product of its (nonzero) digits is 254016, while the sum is 44.

The square root of 70638479 is about 8404.6700708594. The cubic root of 70638479 is about 413.3777652692.

It can be divided in two parts, 70638 and 479, that added together give a palindrome (71117).

The spelling of 70638479 in words is "seventy million, six hundred thirty-eight thousand, four hundred seventy-nine".