70978133 has 4 divisors (see below), whose sum is σ = 71291040. Its totient is φ = 70665228.

The previous prime is 70978097. The next prime is 70978147. The reversal of 70978133 is 33187907.

It is a happy number.

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.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70978133 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70948133) 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, 156113 + ... + 156566.

It is an arithmetic number, because the mean of its divisors is an integer number (17822760).

Almost surely, 2^70978133 is an apocalyptic number.

It is an amenable number.

70978133 is a deficient number, since it is larger than the sum of its proper divisors (312907).

70978133 is a wasteful number, since it uses less digits than its factorization.

70978133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312906.

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

The square root of 70978133 is about 8424.8521055268. The cubic root of 70978133 is about 414.0392601258.

The spelling of 70978133 in words is "seventy million, nine hundred seventy-eight thousand, one hundred thirty-three".