72415877 has 2 divisors, whose sum is σ = 72415878. Its totient is φ = 72415876.

The previous prime is 72415873. The next prime is 72415879. The reversal of 72415877 is 77851427.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54893281 + 17522596 = 7409^2 + 4186^2 .

It is a cyclic number.

It is not a de Polignac number, because 72415877 - 2² = 72415873 is a prime.

Together with 72415879, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72415873) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36207938 + 36207939.

It is an arithmetic number, because the mean of its divisors is an integer number (36207939).

Almost surely, 2^72415877 is an apocalyptic number.

It is an amenable number.

72415877 is a deficient number, since it is larger than the sum of its proper divisors (1).

72415877 is an equidigital number, since it uses as much as digits as its factorization.

72415877 is an evil number, because the sum of its binary digits is even.

The product of its digits is 109760, while the sum is 41.

The square root of 72415877 is about 8509.7518765238. The cubic root of 72415877 is about 416.8162079411.

The spelling of 72415877 in words is "seventy-two million, four hundred fifteen thousand, eight hundred seventy-seven".