70671381 has 12 divisors (see below), whose sum is σ = 103574016. Its totient is φ = 42830920.

The previous prime is 70671379. The next prime is 70671383. The reversal of 70671381 is 18317607.

It is an interprime number because it is at equal distance from previous prime (70671379) and next prime (70671383).

It is not a de Polignac number, because 70671381 - 2¹ = 70671379 is a prime.

It is a super-2 number, since 2×70671381² = 9988888184894322, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70671383) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 96981 + ... + 97706.

It is an arithmetic number, because the mean of its divisors is an integer number (8631168).

Almost surely, 2^70671381 is an apocalyptic number.

It is an amenable number.

70671381 is a deficient number, since it is larger than the sum of its proper divisors (32902635).

70671381 is a wasteful number, since it uses less digits than its factorization.

70671381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 194712 (or 194701 counting only the distinct ones).

The product of its (nonzero) digits is 7056, while the sum is 33.

The square root of 70671381 is about 8406.6272071503. The cubic root of 70671381 is about 413.4419363569.

Adding to 70671381 its reverse (18317607), we get a palindrome (88988988).

It can be divided in two parts, 7067 and 1381, that added together give a palindrome (8448).

The spelling of 70671381 in words is "seventy million, six hundred seventy-one thousand, three hundred eighty-one".