77331403 has 4 divisors (see below), whose sum is σ = 78976800. Its totient is φ = 75686008.

The previous prime is 77331389. The next prime is 77331421. The reversal of 77331403 is 30413377.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 30413377 = 67 ⋅453931.

It is a cyclic number.

It is not a de Polignac number, because 77331403 - 2²¹ = 75234251 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77331493) 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, 822628 + ... + 822721.

It is an arithmetic number, because the mean of its divisors is an integer number (19744200).

Almost surely, 2^77331403 is an apocalyptic number.

77331403 is a deficient number, since it is larger than the sum of its proper divisors (1645397).

77331403 is a wasteful number, since it uses less digits than its factorization.

77331403 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1645396.

The product of its (nonzero) digits is 5292, while the sum is 28.

The square root of 77331403 is about 8793.8275511861. The cubic root of 77331403 is about 426.0415569971.

The spelling of 77331403 in words is "seventy-seven million, three hundred thirty-one thousand, four hundred three".