70138143 has 20 divisors (see below), whose sum is σ = 105004768. Its totient is φ = 46656000.

The previous prime is 70138129. The next prime is 70138157. The reversal of 70138143 is 34183107.

It is an interprime number because it is at equal distance from previous prime (70138129) and next prime (70138157).

It is not a de Polignac number, because 70138143 - 2⁵ = 70138111 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70138193) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 60255 + ... + 61407.

Almost surely, 2^70138143 is an apocalyptic number.

70138143 is a deficient number, since it is larger than the sum of its proper divisors (34866625).

70138143 is a wasteful number, since it uses less digits than its factorization.

70138143 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1916 (or 1907 counting only the distinct ones).

The product of its (nonzero) digits is 2016, while the sum is 27.

The square root of 70138143 is about 8374.8518195846. The cubic root of 70138143 is about 412.3994597945.

The spelling of 70138143 in words is "seventy million, one hundred thirty-eight thousand, one hundred forty-three".