70729031 has 8 divisors (see below), whose sum is σ = 73108224. Its totient is φ = 68386360.

The previous prime is 70729013. The next prime is 70729037. The reversal of 70729031 is 13092707.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70729031 is a prime.

It is a super-2 number, since 2×70729031² = 10005191652397922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 70728985 and 70729003.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70729037) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5165 + ... + 12966.

It is an arithmetic number, because the mean of its divisors is an integer number (9138528).

Almost surely, 2^70729031 is an apocalyptic number.

70729031 is a deficient number, since it is larger than the sum of its proper divisors (2379193).

70729031 is a wasteful number, since it uses less digits than its factorization.

70729031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18261.

The product of its (nonzero) digits is 2646, while the sum is 29.

The square root of 70729031 is about 8410.0553505907. The cubic root of 70729031 is about 413.5543272056.

The spelling of 70729031 in words is "seventy million, seven hundred twenty-nine thousand, thirty-one".