72949879 has 2 divisors, whose sum is σ = 72949880. Its totient is φ = 72949878.

The previous prime is 72949871. The next prime is 72949909. The reversal of 72949879 is 97894927.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72949879 - 2³ = 72949871 is a prime.

It is a super-2 number, since 2×72949879² = 10643369692229282, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72949871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36474939 + 36474940.

It is an arithmetic number, because the mean of its divisors is an integer number (36474940).

Almost surely, 2^72949879 is an apocalyptic number.

72949879 is a deficient number, since it is larger than the sum of its proper divisors (1).

72949879 is an equidigital number, since it uses as much as digits as its factorization.

72949879 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2286144, while the sum is 55.

The square root of 72949879 is about 8541.0701320151. The cubic root of 72949879 is about 417.8382481227.

The spelling of 72949879 in words is "seventy-two million, nine hundred forty-nine thousand, eight hundred seventy-nine".