71949679 has 2 divisors, whose sum is σ = 71949680. Its totient is φ = 71949678.

The previous prime is 71949643. The next prime is 71949743. The reversal of 71949679 is 97694917.

It is a weak prime.

It is an emirp because it is prime and its reverse (97694917) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 71949679 - 2⁹ = 71949167 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (71949079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35974839 + 35974840.

It is an arithmetic number, because the mean of its divisors is an integer number (35974840).

Almost surely, 2^71949679 is an apocalyptic number.

71949679 is a deficient number, since it is larger than the sum of its proper divisors (1).

71949679 is an equidigital number, since it uses as much as digits as its factorization.

71949679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 857304, while the sum is 52.

The square root of 71949679 is about 8482.3156626006. The cubic root of 71949679 is about 415.9198235986.

The spelling of 71949679 in words is "seventy-one million, nine hundred forty-nine thousand, six hundred seventy-nine".