117028537 has 4 divisors (see below), whose sum is σ = 117070416. Its totient is φ = 116986660.

The previous prime is 117028529. The next prime is 117028547. The reversal of 117028537 is 735820711.

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, and also an emirpimes, since its reverse is a distinct semiprime: 735820711 = 977 ⋅753143.

It is a cyclic number.

It is not a de Polignac number, because 117028537 - 2³ = 117028529 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (117028547) 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, 16423 + ... + 22444.

It is an arithmetic number, because the mean of its divisors is an integer number (29267604).

Almost surely, 2^117028537 is an apocalyptic number.

It is an amenable number.

117028537 is a deficient number, since it is larger than the sum of its proper divisors (41879).

117028537 is an equidigital number, since it uses as much as digits as its factorization.

117028537 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 41878.

The product of its (nonzero) digits is 11760, while the sum is 34.

The square root of 117028537 is about 10817.9728692579. The cubic root of 117028537 is about 489.1370860063.

The spelling of 117028537 in words is "one hundred seventeen million, twenty-eight thousand, five hundred thirty-seven".