71492681 has 4 divisors (see below), whose sum is σ = 76992132. Its totient is φ = 65993232.

The previous prime is 71492677. The next prime is 71492689. The reversal of 71492681 is 18629417.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 18629417 = 67 ⋅278051.

It can be written as a sum of positive squares in 2 ways, for example, as 13808656 + 57684025 = 3716^2 + 7595^2 .

It is a cyclic number.

It is not a de Polignac number, because 71492681 - 2² = 71492677 is a prime.

It is a super-2 number, since 2×71492681² = 10222406873135522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (71492689) 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, 2749706 + ... + 2749731.

It is an arithmetic number, because the mean of its divisors is an integer number (19248033).

Almost surely, 2^71492681 is an apocalyptic number.

It is an amenable number.

71492681 is a deficient number, since it is larger than the sum of its proper divisors (5499451).

71492681 is a wasteful number, since it uses less digits than its factorization.

71492681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5499450.

The product of its digits is 24192, while the sum is 38.

The square root of 71492681 is about 8455.3344700254. The cubic root of 71492681 is about 415.0373624851.

The spelling of 71492681 in words is "seventy-one million, four hundred ninety-two thousand, six hundred eighty-one".