71489649 has 16 divisors (see below), whose sum is σ = 118840320. Its totient is φ = 37137360.

The previous prime is 71489629. The next prime is 71489653. The reversal of 71489649 is 94698417.

It is not a de Polignac number, because 71489649 - 2⁵ = 71489617 is a prime.

It is a super-2 number, since 2×71489649² = 10221539828286402, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 71489598 and 71489607.

It is not an unprimeable number, because it can be changed into a prime (71489629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 154509 + ... + 154970.

It is an arithmetic number, because the mean of its divisors is an integer number (7427520).

Almost surely, 2^71489649 is an apocalyptic number.

It is an amenable number.

71489649 is a deficient number, since it is larger than the sum of its proper divisors (47350671).

71489649 is a wasteful number, since it uses less digits than its factorization.

71489649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309500.

The product of its digits is 435456, while the sum is 48.

The square root of 71489649 is about 8455.1551730291. The cubic root of 71489649 is about 415.0314951662.

The spelling of 71489649 in words is "seventy-one million, four hundred eighty-nine thousand, six hundred forty-nine".