77272631 has 4 divisors (see below), whose sum is σ = 77639064. Its totient is φ = 76906200.

The previous prime is 77272619. The next prime is 77272649. The reversal of 77272631 is 13627277.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13627277 = 191 ⋅71347.

It is a cyclic number.

It is not a de Polignac number, because 77272631 - 2⁶ = 77272567 is a prime.

It is a super-2 number, since 2×77272631² = 11942119003324322, 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 = 77272591 and 77272600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (77272651) 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, 182900 + ... + 183321.

It is an arithmetic number, because the mean of its divisors is an integer number (19409766).

Almost surely, 2^77272631 is an apocalyptic number.

77272631 is a deficient number, since it is larger than the sum of its proper divisors (366433).

77272631 is a wasteful number, since it uses less digits than its factorization.

77272631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 366432.

The product of its digits is 24696, while the sum is 35.

The square root of 77272631 is about 8790.4852539550. The cubic root of 77272631 is about 425.9335988697.

The spelling of 77272631 in words is "seventy-seven million, two hundred seventy-two thousand, six hundred thirty-one".