77530531 has 8 divisors (see below), whose sum is σ = 83661984. Its totient is φ = 71423040.

The previous prime is 77530499. The next prime is 77530547. The reversal of 77530531 is 13503577.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 77530531 - 2⁵ = 77530499 is a prime.

It is a super-2 number, since 2×77530531² = 12021966474283922, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 77530493 and 77530502.

It is not an unprimeable number, because it can be changed into a prime (77530561) 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 7 ways as a sum of consecutive naturals, for example, 1050 + ... + 12496.

It is an arithmetic number, because the mean of its divisors is an integer number (10457748).

Almost surely, 2^77530531 is an apocalyptic number.

77530531 is a deficient number, since it is larger than the sum of its proper divisors (6131453).

77530531 is a wasteful number, since it uses less digits than its factorization.

77530531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11981.

The product of its (nonzero) digits is 11025, while the sum is 31.

The square root of 77530531 is about 8805.1423043583. The cubic root of 77530531 is about 426.4069285700.

The spelling of 77530531 in words is "seventy-seven million, five hundred thirty thousand, five hundred thirty-one".