79477249 has 2 divisors, whose sum is σ = 79477250. Its totient is φ = 79477248.

The previous prime is 79477243. The next prime is 79477271. The reversal of 79477249 is 94277497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 72795024 + 6682225 = 8532^2 + 2585^2 .

It is an emirp because it is prime and its reverse (94277497) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 79477249 - 2¹⁵ = 79444481 is a prime.

It is not a weakly prime, because it can be changed into another prime (79477243) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39738624 + 39738625.

It is an arithmetic number, because the mean of its divisors is an integer number (39738625).

Almost surely, 2^79477249 is an apocalyptic number.

It is an amenable number.

79477249 is a deficient number, since it is larger than the sum of its proper divisors (1).

79477249 is an equidigital number, since it uses as much as digits as its factorization.

79477249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 889056, while the sum is 49.

The square root of 79477249 is about 8915.0013460459. The cubic root of 79477249 is about 429.9463589118.

The spelling of 79477249 in words is "seventy-nine million, four hundred seventy-seven thousand, two hundred forty-nine".