71002669 has 4 divisors (see below), whose sum is σ = 72342396. Its totient is φ = 69662944.

The previous prime is 71002663. The next prime is 71002691. The reversal of 71002669 is 96620017.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 96620017 = 13 ⋅7432309.

It can be written as a sum of positive squares in 2 ways, for example, as 64561225 + 6441444 = 8035^2 + 2538^2 .

It is a cyclic number.

It is not a de Polignac number, because 71002669 - 2¹⁷ = 70871597 is a prime.

It is a super-2 number, since 2×71002669² = 10082758010247122, 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 71002669.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71002663) 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, 669784 + ... + 669889.

It is an arithmetic number, because the mean of its divisors is an integer number (18085599).

Almost surely, 2^71002669 is an apocalyptic number.

It is an amenable number.

71002669 is a deficient number, since it is larger than the sum of its proper divisors (1339727).

71002669 is a wasteful number, since it uses less digits than its factorization.

71002669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1339726.

The product of its (nonzero) digits is 4536, while the sum is 31.

The square root of 71002669 is about 8426.3081477003. The cubic root of 71002669 is about 414.0869635358.

The spelling of 71002669 in words is "seventy-one million, two thousand, six hundred sixty-nine".