194887497 has 32 divisors (see below), whose sum is σ = 303980544. Its totient is φ = 108763200.

The previous prime is 194887493. The next prime is 194887501. The reversal of 194887497 is 794788491.

It is an interprime number because it is at equal distance from previous prime (194887493) and next prime (194887501).

It is not a de Polignac number, because 194887497 - 2² = 194887493 is a prime.

It is a super-2 number, since 2×194887497² = 75962272973850018, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (194887493) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 213472 + ... + 214382.

It is an arithmetic number, because the mean of its divisors is an integer number (9499392).

Almost surely, 2^194887497 is an apocalyptic number.

It is an amenable number.

194887497 is a deficient number, since it is larger than the sum of its proper divisors (109093047).

194887497 is a wasteful number, since it uses less digits than its factorization.

194887497 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1149.

The product of its digits is 4064256, while the sum is 57.

The square root of 194887497 is about 13960.2112090040. The cubic root of 194887497 is about 579.7774582222. Note that the first 3 decimals are identical.

The spelling of 194887497 in words is "one hundred ninety-four million, eight hundred eighty-seven thousand, four hundred ninety-seven".