71677399 has 4 divisors (see below), whose sum is σ = 73614664. Its totient is φ = 69740136.

The previous prime is 71677393. The next prime is 71677409. The reversal of 71677399 is 99377617.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 99377617 = 281 ⋅353657.

It is a cyclic number.

It is not a de Polignac number, because 71677399 - 2¹³ = 71669207 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 (71677393) 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, 968577 + ... + 968650.

It is an arithmetic number, because the mean of its divisors is an integer number (18403666).

Almost surely, 2^71677399 is an apocalyptic number.

71677399 is a deficient number, since it is larger than the sum of its proper divisors (1937265).

71677399 is a wasteful number, since it uses less digits than its factorization.

71677399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1937264.

The product of its digits is 500094, while the sum is 49.

The square root of 71677399 is about 8466.2505868891. The cubic root of 71677399 is about 415.3945036538.

The spelling of 71677399 in words is "seventy-one million, six hundred seventy-seven thousand, three hundred ninety-nine".