70308631 has 4 divisors (see below), whose sum is σ = 73365552. Its totient is φ = 67251712.

The previous prime is 70308629. The next prime is 70308643. The reversal of 70308631 is 13680307.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13680307 = 53 ⋅258119.

It is a cyclic number.

It is not a de Polignac number, because 70308631 - 2¹ = 70308629 is a prime.

It is a super-2 number, since 2×70308631² = 9886607186188322, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 70308631.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (70308611) 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, 1528426 + ... + 1528471.

It is an arithmetic number, because the mean of its divisors is an integer number (18341388).

Almost surely, 2^70308631 is an apocalyptic number.

70308631 is a deficient number, since it is larger than the sum of its proper divisors (3056921).

70308631 is a wasteful number, since it uses less digits than its factorization.

70308631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3056920.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 70308631 is about 8385.0242098637. The cubic root of 70308631 is about 412.7333355098.

Adding to 70308631 its reverse (13680307), we get a palindrome (83988938).

The spelling of 70308631 in words is "seventy million, three hundred eight thousand, six hundred thirty-one".