77990077293 has 4 divisors (see below), whose sum is σ = 103986769728. Its totient is φ = 51993384860.

The previous prime is 77990077259. The next prime is 77990077301. The reversal of 77990077293 is 39277009977.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 39277009977 = 3 ⋅13092336659.

It is a cyclic number.

It is not a de Polignac number, because 77990077293 - 2¹² = 77990073197 is a prime.

It is a super-2 number, since 2×77990077293² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77990077393) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12998346213 + ... + 12998346218.

It is an arithmetic number, because the mean of its divisors is an integer number (25996692432).

Almost surely, 2^77990077293 is an apocalyptic number.

It is an amenable number.

77990077293 is a deficient number, since it is larger than the sum of its proper divisors (25996692435).

77990077293 is a wasteful number, since it uses less digits than its factorization.

77990077293 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25996692434.

The product of its (nonzero) digits is 10501974, while the sum is 60.

The spelling of 77990077293 in words is "seventy-seven billion, nine hundred ninety million, seventy-seven thousand, two hundred ninety-three".