77396401 has 4 divisors (see below), whose sum is σ = 78162804. Its totient is φ = 76630000.

The previous prime is 77396399. The next prime is 77396413. The reversal of 77396401 is 10469377.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 10469377 = 29 ⋅361013.

It can be written as a sum of positive squares in 2 ways, for example, as 76108176 + 1288225 = 8724^2 + 1135^2 .

It is a cyclic number.

It is not a de Polignac number, because 77396401 - 2¹ = 77396399 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77396471) 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, 383050 + ... + 383251.

It is an arithmetic number, because the mean of its divisors is an integer number (19540701).

Almost surely, 2^77396401 is an apocalyptic number.

It is an amenable number.

77396401 is a deficient number, since it is larger than the sum of its proper divisors (766403).

77396401 is a wasteful number, since it uses less digits than its factorization.

77396401 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766402.

The product of its (nonzero) digits is 31752, while the sum is 37.

The square root of 77396401 is about 8797.5224353223. The cubic root of 77396401 is about 426.1608879684.

The spelling of 77396401 in words is "seventy-seven million, three hundred ninety-six thousand, four hundred one".