190897539 has 64 divisors (see below), whose sum is σ = 327131136. Its totient is φ = 96459264.

The previous prime is 190897529. The next prime is 190897543. The reversal of 190897539 is 935798091.

It is a happy number.

190897539 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 190897539 - 2⁵ = 190897507 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is a junction number, because it is equal to n+sod(n) for n = 190897491 and 190897500.

It is not an unprimeable number, because it can be changed into a prime (190897519) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 549964 + ... + 550310.

It is an arithmetic number, because the mean of its divisors is an integer number (5111424).

Almost surely, 2^190897539 is an apocalyptic number.

190897539 is a deficient number, since it is larger than the sum of its proper divisors (136233597).

190897539 is a wasteful number, since it uses less digits than its factorization.

190897539 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 464.

The product of its (nonzero) digits is 612360, while the sum is 51.

The square root of 190897539 is about 13816.5675549320. The cubic root of 190897539 is about 575.7935246880.

The spelling of 190897539 in words is "one hundred ninety million, eight hundred ninety-seven thousand, five hundred thirty-nine".