77949373 has 2 divisors, whose sum is σ = 77949374. Its totient is φ = 77949372.

The previous prime is 77949353. The next prime is 77949463. The reversal of 77949373 is 37394977.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 60793209 + 17156164 = 7797^2 + 4142^2 .

It is a cyclic number.

It is not a de Polignac number, because 77949373 - 2⁹ = 77948861 is a prime.

It is a super-2 number, since 2×77949373² = 12152209502186258, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77949353) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38974686 + 38974687.

It is an arithmetic number, because the mean of its divisors is an integer number (38974687).

Almost surely, 2^77949373 is an apocalyptic number.

It is an amenable number.

77949373 is a deficient number, since it is larger than the sum of its proper divisors (1).

77949373 is an equidigital number, since it uses as much as digits as its factorization.

77949373 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1000188, while the sum is 49.

The square root of 77949373 is about 8828.8942116213. The cubic root of 77949373 is about 427.1734071834.

The spelling of 77949373 in words is "seventy-seven million, nine hundred forty-nine thousand, three hundred seventy-three".