76403257 has 4 divisors (see below), whose sum is σ = 87318016. Its totient is φ = 65488500.

The previous prime is 76403233. The next prime is 76403267. The reversal of 76403257 is 75230467.

It is a happy number.

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: 75230467 = 13 ⋅5786959.

It is not a de Polignac number, because 76403257 - 2¹⁹ = 75878969 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (76403227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5457369 + ... + 5457382.

It is an arithmetic number, because the mean of its divisors is an integer number (21829504).

Almost surely, 2^76403257 is an apocalyptic number.

It is an amenable number.

76403257 is a deficient number, since it is larger than the sum of its proper divisors (10914759).

76403257 is a wasteful number, since it uses less digits than its factorization.

76403257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10914758.

The product of its (nonzero) digits is 35280, while the sum is 34.

The square root of 76403257 is about 8740.8956634890. The cubic root of 76403257 is about 424.3302151243.

The spelling of 76403257 in words is "seventy-six million, four hundred three thousand, two hundred fifty-seven".