77250479 has 2 divisors, whose sum is σ = 77250480. Its totient is φ = 77250478.

The previous prime is 77250449. The next prime is 77250497. The reversal of 77250479 is 97405277.

Together with next prime (77250497) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 77250479 - 2¹² = 77246383 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (77250449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 38625239 + 38625240.

It is an arithmetic number, because the mean of its divisors is an integer number (38625240).

Almost surely, 2^77250479 is an apocalyptic number.

77250479 is a deficient number, since it is larger than the sum of its proper divisors (1).

77250479 is an equidigital number, since it uses as much as digits as its factorization.

77250479 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 123480, while the sum is 41.

The square root of 77250479 is about 8789.2251649392. The cubic root of 77250479 is about 425.8928937166.

The spelling of 77250479 in words is "seventy-seven million, two hundred fifty thousand, four hundred seventy-nine".