72881407 has 2 divisors, whose sum is σ = 72881408. Its totient is φ = 72881406.

The previous prime is 72881401. The next prime is 72881483. The reversal of 72881407 is 70418827.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72881407 - 2³ = 72881399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72881401) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36440703 + 36440704.

It is an arithmetic number, because the mean of its divisors is an integer number (36440704).

Almost surely, 2^72881407 is an apocalyptic number.

72881407 is a deficient number, since it is larger than the sum of its proper divisors (1).

72881407 is an equidigital number, since it uses as much as digits as its factorization.

72881407 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 25088, while the sum is 37.

The square root of 72881407 is about 8537.0607939735. The cubic root of 72881407 is about 417.7074771654.

The spelling of 72881407 in words is "seventy-two million, eight hundred eighty-one thousand, four hundred seven".