77641297 has 4 divisors (see below), whose sum is σ = 78395200. Its totient is φ = 76887396.

The previous prime is 77641259. The next prime is 77641303. The reversal of 77641297 is 79214677.

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: 79214677 = 5107 ⋅15511.

It is a cyclic number.

It is not a de Polignac number, because 77641297 - 2¹⁵ = 77608529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77641247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 376797 + ... + 377002.

It is an arithmetic number, because the mean of its divisors is an integer number (19598800).

Almost surely, 2^77641297 is an apocalyptic number.

It is an amenable number.

77641297 is a deficient number, since it is larger than the sum of its proper divisors (753903).

77641297 is a wasteful number, since it uses less digits than its factorization.

77641297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 753902.

The product of its digits is 148176, while the sum is 43.

The square root of 77641297 is about 8811.4299066610. The cubic root of 77641297 is about 426.6098977070.

The spelling of 77641297 in words is "seventy-seven million, six hundred forty-one thousand, two hundred ninety-seven".