820074037 has 4 divisors (see below), whose sum is σ = 832314016. Its totient is φ = 807834060.

The previous prime is 820074019. The next prime is 820074049. The reversal of 820074037 is 730470028.

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 a cyclic number.

It is not a de Polignac number, because 820074037 - 2⁷ = 820073909 is a prime.

It is a super-2 number, since 2×820074037² = 1345042852322954738, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (820075037) 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, 6119889 + ... + 6120022.

It is an arithmetic number, because the mean of its divisors is an integer number (208078504).

Almost surely, 2^820074037 is an apocalyptic number.

It is an amenable number.

820074037 is a deficient number, since it is larger than the sum of its proper divisors (12239979).

820074037 is a wasteful number, since it uses less digits than its factorization.

820074037 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12239978.

The product of its (nonzero) digits is 9408, while the sum is 31.

The square root of 820074037 is about 28636.9348394691. The cubic root of 820074037 is about 936.0183313459.

The spelling of 820074037 in words is "eight hundred twenty million, seventy-four thousand, thirty-seven".