72100979 has 2 divisors, whose sum is σ = 72100980. Its totient is φ = 72100978.

The previous prime is 72100969. The next prime is 72101011. The reversal of 72100979 is 97900127.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72100979 - 2¹² = 72096883 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (72100909) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36050489 + 36050490.

It is an arithmetic number, because the mean of its divisors is an integer number (36050490).

Almost surely, 2^72100979 is an apocalyptic number.

72100979 is a deficient number, since it is larger than the sum of its proper divisors (1).

72100979 is an equidigital number, since it uses as much as digits as its factorization.

72100979 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7938, while the sum is 35.

The square root of 72100979 is about 8491.2295340545. The cubic root of 72100979 is about 416.2111596713.

The spelling of 72100979 in words is "seventy-two million, one hundred thousand, nine hundred seventy-nine".