70931137 has 8 divisors (see below), whose sum is σ = 71493120. Its totient is φ = 70371840.

The previous prime is 70931099. The next prime is 70931143. The reversal of 70931137 is 73113907.

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

It is a cyclic number.

It is not a de Polignac number, because 70931137 - 2¹⁵ = 70898369 is a prime.

It is a super-2 number, since 2×70931137² = 10062452392225538, 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 = 70931099 and 70931108.

It is not an unprimeable number, because it can be changed into a prime (70931197) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 110337 + ... + 110977.

It is an arithmetic number, because the mean of its divisors is an integer number (8936640).

Almost surely, 2^70931137 is an apocalyptic number.

It is an amenable number.

70931137 is a deficient number, since it is larger than the sum of its proper divisors (561983).

70931137 is a wasteful number, since it uses less digits than its factorization.

70931137 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343.

The product of its (nonzero) digits is 3969, while the sum is 31.

The square root of 70931137 is about 8422.0625146101. The cubic root of 70931137 is about 413.9478588056.

The spelling of 70931137 in words is "seventy million, nine hundred thirty-one thousand, one hundred thirty-seven".