77240273 has 4 divisors (see below), whose sum is σ = 84262128. Its totient is φ = 70218420.

The previous prime is 77240249. The next prime is 77240297. The reversal of 77240273 is 37204277.

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.

It is an interprime number because it is at equal distance from previous prime (77240249) and next prime (77240297).

It is a cyclic number.

It is not a de Polignac number, because 77240273 - 2¹⁰ = 77239249 is a prime.

It is a super-2 number, since 2×77240273² = 11932119546229058, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (77240203) 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, 3510911 + ... + 3510932.

It is an arithmetic number, because the mean of its divisors is an integer number (21065532).

Almost surely, 2^77240273 is an apocalyptic number.

It is an amenable number.

77240273 is a deficient number, since it is larger than the sum of its proper divisors (7021855).

77240273 is a wasteful number, since it uses less digits than its factorization.

77240273 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7021854.

The product of its (nonzero) digits is 16464, while the sum is 32.

The square root of 77240273 is about 8788.6445485069. The cubic root of 77240273 is about 425.8741371800.

The spelling of 77240273 in words is "seventy-seven million, two hundred forty thousand, two hundred seventy-three".