79490149 has 2 divisors, whose sum is σ = 79490150. Its totient is φ = 79490148.

The previous prime is 79490143. The next prime is 79490209. The reversal of 79490149 is 94109497.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46485124 + 33005025 = 6818^2 + 5745^2 .

It is a cyclic number.

It is not a de Polignac number, because 79490149 - 2¹⁵ = 79457381 is a prime.

It is a super-3 number, since 3×79490149³ (a number of 25 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (79490143) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 39745074 + 39745075.

It is an arithmetic number, because the mean of its divisors is an integer number (39745075).

Almost surely, 2^79490149 is an apocalyptic number.

It is an amenable number.

79490149 is a deficient number, since it is larger than the sum of its proper divisors (1).

79490149 is an equidigital number, since it uses as much as digits as its factorization.

79490149 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 81648, while the sum is 43.

The square root of 79490149 is about 8915.7248163007. The cubic root of 79490149 is about 429.9696192705.

The spelling of 79490149 in words is "seventy-nine million, four hundred ninety thousand, one hundred forty-nine".