71690045 has 16 divisors (see below), whose sum is σ = 99042048. Its totient is φ = 48796800.

The previous prime is 71690041. The next prime is 71690083. The reversal of 71690045 is 54009617.

It is a happy number.

It is not a de Polignac number, because 71690045 - 2² = 71690041 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71689993 and 71690020.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (71690041) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2681 + ... + 12270.

It is an arithmetic number, because the mean of its divisors is an integer number (6190128).

Almost surely, 2^71690045 is an apocalyptic number.

It is an amenable number.

71690045 is a deficient number, since it is larger than the sum of its proper divisors (27352003).

71690045 is a wasteful number, since it uses less digits than its factorization.

71690045 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15100.

The product of its (nonzero) digits is 7560, while the sum is 32.

The square root of 71690045 is about 8466.9974016767. The cubic root of 71690045 is about 415.4189314840.

The spelling of 71690045 in words is "seventy-one million, six hundred ninety thousand, forty-five".