71213407 has 4 divisors (see below), whose sum is σ = 71338696. Its totient is φ = 71088120.

The previous prime is 71213399. The next prime is 71213437. The reversal of 71213407 is 70431217.

It is a happy number.

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 71213407 - 2³ = 71213399 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 (71213437) 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, 61788 + ... + 62929.

It is an arithmetic number, because the mean of its divisors is an integer number (17834674).

Almost surely, 2^71213407 is an apocalyptic number.

71213407 is a deficient number, since it is larger than the sum of its proper divisors (125289).

71213407 is a wasteful number, since it uses less digits than its factorization.

71213407 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 125288.

The product of its (nonzero) digits is 1176, while the sum is 25.

The square root of 71213407 is about 8438.8036474372. The cubic root of 71213407 is about 414.4962329709.

The spelling of 71213407 in words is "seventy-one million, two hundred thirteen thousand, four hundred seven".