78090037 has 4 divisors (see below), whose sum is σ = 81485280. Its totient is φ = 74694796.

The previous prime is 78090029. The next prime is 78090053. The reversal of 78090037 is 73009087.

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 78090037 - 2³ = 78090029 is a prime.

It is a super-2 number, since 2×78090037² = 12196107757322738, 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 = 78089984 and 78090011.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (78000037) 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, 1697587 + ... + 1697632.

It is an arithmetic number, because the mean of its divisors is an integer number (20371320).

Almost surely, 2^78090037 is an apocalyptic number.

It is an amenable number.

78090037 is a deficient number, since it is larger than the sum of its proper divisors (3395243).

78090037 is a wasteful number, since it uses less digits than its factorization.

78090037 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3395242.

The product of its (nonzero) digits is 10584, while the sum is 34.

The square root of 78090037 is about 8836.8567375510. The cubic root of 78090037 is about 427.4302055387.

The spelling of 78090037 in words is "seventy-eight million, ninety thousand, thirty-seven".