71490047 has 2 divisors, whose sum is σ = 71490048. Its totient is φ = 71490046.

The previous prime is 71489993. The next prime is 71490073. The reversal of 71490047 is 74009417.

It is a strong prime.

It is an emirp because it is prime and its reverse (74009417) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71490047 - 2¹⁰ = 71489023 is a prime.

It is a super-2 number, since 2×71490047² = 10221653640124418, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71489995 and 71490022.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71490077) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35745023 + 35745024.

It is an arithmetic number, because the mean of its divisors is an integer number (35745024).

Almost surely, 2^71490047 is an apocalyptic number.

71490047 is a deficient number, since it is larger than the sum of its proper divisors (1).

71490047 is an equidigital number, since it uses as much as digits as its factorization.

71490047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7056, while the sum is 32.

The square root of 71490047 is about 8455.1787089334. The cubic root of 71490047 is about 415.0322653580.

The spelling of 71490047 in words is "seventy-one million, four hundred ninety thousand, forty-seven".