31470623 has 2 divisors, whose sum is σ = 31470624. Its totient is φ = 31470622.

The previous prime is 31470619. The next prime is 31470629. The reversal of 31470623 is 32607413.

It is a weak prime.

It is an emirp because it is prime and its reverse (32607413) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31470623 - 2² = 31470619 is a prime.

It is a super-2 number, since 2×31470623² = 1980800224016258, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 31470592 and 31470601.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31470629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15735311 + 15735312.

It is an arithmetic number, because the mean of its divisors is an integer number (15735312).

Almost surely, 2^31470623 is an apocalyptic number.

31470623 is a deficient number, since it is larger than the sum of its proper divisors (1).

31470623 is an equidigital number, since it uses as much as digits as its factorization.

31470623 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 26.

The square root of 31470623 is about 5609.8683585268. The cubic root of 31470623 is about 315.7197717299.

The spelling of 31470623 in words is "thirty-one million, four hundred seventy thousand, six hundred twenty-three".