71479939 has 2 divisors, whose sum is σ = 71479940. Its totient is φ = 71479938.

The previous prime is 71479907. The next prime is 71479943. The reversal of 71479939 is 93997417.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 71479939 - 2⁵ = 71479907 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 71479892 and 71479901.

It is not a weakly prime, because it can be changed into another prime (71479999) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35739969 + 35739970.

It is an arithmetic number, because the mean of its divisors is an integer number (35739970).

Almost surely, 2^71479939 is an apocalyptic number.

71479939 is a deficient number, since it is larger than the sum of its proper divisors (1).

71479939 is an equidigital number, since it uses as much as digits as its factorization.

71479939 is an evil number, because the sum of its binary digits is even.

The product of its digits is 428652, while the sum is 49.

The square root of 71479939 is about 8454.5809476283. The cubic root of 71479939 is about 415.0127039223.

The spelling of 71479939 in words is "seventy-one million, four hundred seventy-nine thousand, nine hundred thirty-nine".