71649007 has 4 divisors (see below), whose sum is σ = 71667936. Its totient is φ = 71630080.

The previous prime is 71648987. The next prime is 71649013. The reversal of 71649007 is 70094617.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 71649007 - 2¹⁵ = 71616239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71649077) 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, 1618 + ... + 12079.

It is an arithmetic number, because the mean of its divisors is an integer number (17916984).

Almost surely, 2^71649007 is an apocalyptic number.

71649007 is a deficient number, since it is larger than the sum of its proper divisors (18929).

71649007 is a wasteful number, since it uses less digits than its factorization.

71649007 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18928.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 71649007 is about 8464.5736454945. The cubic root of 71649007 is about 415.3396493647.

The spelling of 71649007 in words is "seventy-one million, six hundred forty-nine thousand, seven".